diff --git a/packages/react-native-codegen/e2e/__tests__/modules/__snapshots__/GenerateModuleCpp-test.js.snap b/packages/react-native-codegen/e2e/__tests__/modules/__snapshots__/GenerateModuleCpp-test.js.snap
index 1fbcaf5a6e5..3130ea41984 100644
--- a/packages/react-native-codegen/e2e/__tests__/modules/__snapshots__/GenerateModuleCpp-test.js.snap
+++ b/packages/react-native-codegen/e2e/__tests__/modules/__snapshots__/GenerateModuleCpp-test.js.snap
@@ -643,7 +643,7 @@ static jsi::Value __hostFunction_NativeSampleTurboModuleNullableAndOptionalCxxSp
 static jsi::Value __hostFunction_NativeSampleTurboModuleNullableAndOptionalCxxSpecJSI_getObjectShape(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
   return static_cast<NativeSampleTurboModuleNullableAndOptionalCxxSpecJSI *>(&turboModule)->getObjectShape(
     rt,
-    count <= 0 || args[0].isNull() || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asObject(rt))
+    count <= 0 || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asObject(rt))
   );
 }
 static jsi::Value __hostFunction_NativeSampleTurboModuleNullableAndOptionalCxxSpecJSI_getAlias(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
@@ -714,70 +714,70 @@ static jsi::Value __hostFunction_NativeSampleTurboModuleOptionalCxxSpecJSI_voidF
 static jsi::Value __hostFunction_NativeSampleTurboModuleOptionalCxxSpecJSI_getBool(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
   return static_cast<NativeSampleTurboModuleOptionalCxxSpecJSI *>(&turboModule)->getBool(
     rt,
-    count <= 0 || args[0].isNull() || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asBool())
+    count <= 0 || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asBool())
   );
 }
 static jsi::Value __hostFunction_NativeSampleTurboModuleOptionalCxxSpecJSI_getNumber(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
   return static_cast<NativeSampleTurboModuleOptionalCxxSpecJSI *>(&turboModule)->getNumber(
     rt,
-    count <= 0 || args[0].isNull() || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asNumber())
+    count <= 0 || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asNumber())
   );
 }
 static jsi::Value __hostFunction_NativeSampleTurboModuleOptionalCxxSpecJSI_getString(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
   return static_cast<NativeSampleTurboModuleOptionalCxxSpecJSI *>(&turboModule)->getString(
     rt,
-    count <= 0 || args[0].isNull() || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asString(rt))
+    count <= 0 || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asString(rt))
   );
 }
 static jsi::Value __hostFunction_NativeSampleTurboModuleOptionalCxxSpecJSI_getArray(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
   return static_cast<NativeSampleTurboModuleOptionalCxxSpecJSI *>(&turboModule)->getArray(
     rt,
-    count <= 0 || args[0].isNull() || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asObject(rt).asArray(rt))
+    count <= 0 || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asObject(rt).asArray(rt))
   );
 }
 static jsi::Value __hostFunction_NativeSampleTurboModuleOptionalCxxSpecJSI_getObject(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
   return static_cast<NativeSampleTurboModuleOptionalCxxSpecJSI *>(&turboModule)->getObject(
     rt,
-    count <= 0 || args[0].isNull() || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asObject(rt))
+    count <= 0 || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asObject(rt))
   );
 }
 static jsi::Value __hostFunction_NativeSampleTurboModuleOptionalCxxSpecJSI_getObjectShape(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
   return static_cast<NativeSampleTurboModuleOptionalCxxSpecJSI *>(&turboModule)->getObjectShape(
     rt,
-    count <= 0 || args[0].isNull() || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asObject(rt))
+    count <= 0 || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asObject(rt))
   );
 }
 static jsi::Value __hostFunction_NativeSampleTurboModuleOptionalCxxSpecJSI_getAlias(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
   return static_cast<NativeSampleTurboModuleOptionalCxxSpecJSI *>(&turboModule)->getAlias(
     rt,
-    count <= 0 || args[0].isNull() || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asObject(rt))
+    count <= 0 || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asObject(rt))
   );
 }
 static jsi::Value __hostFunction_NativeSampleTurboModuleOptionalCxxSpecJSI_getRootTag(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
   return static_cast<NativeSampleTurboModuleOptionalCxxSpecJSI *>(&turboModule)->getRootTag(
     rt,
-    count <= 0 || args[0].isNull() || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asNumber())
+    count <= 0 || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asNumber())
   );
 }
 static jsi::Value __hostFunction_NativeSampleTurboModuleOptionalCxxSpecJSI_getValue(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
   return static_cast<NativeSampleTurboModuleOptionalCxxSpecJSI *>(&turboModule)->getValue(
     rt,
-    count <= 0 || args[0].isNull() || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asNumber()),
-    count <= 1 || args[1].isNull() || args[1].isUndefined() ? std::nullopt : std::make_optional(args[1].asString(rt)),
-    count <= 2 || args[2].isNull() || args[2].isUndefined() ? std::nullopt : std::make_optional(args[2].asObject(rt))
+    count <= 0 || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asNumber()),
+    count <= 1 || args[1].isUndefined() ? std::nullopt : std::make_optional(args[1].asString(rt)),
+    count <= 2 || args[2].isUndefined() ? std::nullopt : std::make_optional(args[2].asObject(rt))
   );
 }
 static jsi::Value __hostFunction_NativeSampleTurboModuleOptionalCxxSpecJSI_getValueWithCallback(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
   static_cast<NativeSampleTurboModuleOptionalCxxSpecJSI *>(&turboModule)->getValueWithCallback(
     rt,
-    count <= 0 || args[0].isNull() || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asObject(rt).asFunction(rt))
+    count <= 0 || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asObject(rt).asFunction(rt))
   );
   return jsi::Value::undefined();
 }
 static jsi::Value __hostFunction_NativeSampleTurboModuleOptionalCxxSpecJSI_getValueWithPromise(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
   return static_cast<NativeSampleTurboModuleOptionalCxxSpecJSI *>(&turboModule)->getValueWithPromise(
     rt,
-    count <= 0 || args[0].isNull() || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asBool())
+    count <= 0 || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asBool())
   );
 }
 
@@ -1464,7 +1464,7 @@ static jsi::Value __hostFunction_NativeSampleTurboModuleNullableAndOptionalCxxSp
 static jsi::Value __hostFunction_NativeSampleTurboModuleNullableAndOptionalCxxSpecJSI_getObjectShape(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
   return static_cast<NativeSampleTurboModuleNullableAndOptionalCxxSpecJSI *>(&turboModule)->getObjectShape(
     rt,
-    count <= 0 || args[0].isNull() || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asObject(rt))
+    count <= 0 || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asObject(rt))
   );
 }
 static jsi::Value __hostFunction_NativeSampleTurboModuleNullableAndOptionalCxxSpecJSI_getAlias(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
@@ -1535,70 +1535,70 @@ static jsi::Value __hostFunction_NativeSampleTurboModuleOptionalCxxSpecJSI_voidF
 static jsi::Value __hostFunction_NativeSampleTurboModuleOptionalCxxSpecJSI_getBool(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
   return static_cast<NativeSampleTurboModuleOptionalCxxSpecJSI *>(&turboModule)->getBool(
     rt,
-    count <= 0 || args[0].isNull() || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asBool())
+    count <= 0 || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asBool())
   );
 }
 static jsi::Value __hostFunction_NativeSampleTurboModuleOptionalCxxSpecJSI_getNumber(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
   return static_cast<NativeSampleTurboModuleOptionalCxxSpecJSI *>(&turboModule)->getNumber(
     rt,
-    count <= 0 || args[0].isNull() || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asNumber())
+    count <= 0 || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asNumber())
   );
 }
 static jsi::Value __hostFunction_NativeSampleTurboModuleOptionalCxxSpecJSI_getString(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
   return static_cast<NativeSampleTurboModuleOptionalCxxSpecJSI *>(&turboModule)->getString(
     rt,
-    count <= 0 || args[0].isNull() || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asString(rt))
+    count <= 0 || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asString(rt))
   );
 }
 static jsi::Value __hostFunction_NativeSampleTurboModuleOptionalCxxSpecJSI_getArray(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
   return static_cast<NativeSampleTurboModuleOptionalCxxSpecJSI *>(&turboModule)->getArray(
     rt,
-    count <= 0 || args[0].isNull() || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asObject(rt).asArray(rt))
+    count <= 0 || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asObject(rt).asArray(rt))
   );
 }
 static jsi::Value __hostFunction_NativeSampleTurboModuleOptionalCxxSpecJSI_getObject(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
   return static_cast<NativeSampleTurboModuleOptionalCxxSpecJSI *>(&turboModule)->getObject(
     rt,
-    count <= 0 || args[0].isNull() || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asObject(rt))
+    count <= 0 || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asObject(rt))
   );
 }
 static jsi::Value __hostFunction_NativeSampleTurboModuleOptionalCxxSpecJSI_getObjectShape(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
   return static_cast<NativeSampleTurboModuleOptionalCxxSpecJSI *>(&turboModule)->getObjectShape(
     rt,
-    count <= 0 || args[0].isNull() || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asObject(rt))
+    count <= 0 || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asObject(rt))
   );
 }
 static jsi::Value __hostFunction_NativeSampleTurboModuleOptionalCxxSpecJSI_getAlias(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
   return static_cast<NativeSampleTurboModuleOptionalCxxSpecJSI *>(&turboModule)->getAlias(
     rt,
-    count <= 0 || args[0].isNull() || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asObject(rt))
+    count <= 0 || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asObject(rt))
   );
 }
 static jsi::Value __hostFunction_NativeSampleTurboModuleOptionalCxxSpecJSI_getRootTag(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
   return static_cast<NativeSampleTurboModuleOptionalCxxSpecJSI *>(&turboModule)->getRootTag(
     rt,
-    count <= 0 || args[0].isNull() || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asNumber())
+    count <= 0 || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asNumber())
   );
 }
 static jsi::Value __hostFunction_NativeSampleTurboModuleOptionalCxxSpecJSI_getValue(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
   return static_cast<NativeSampleTurboModuleOptionalCxxSpecJSI *>(&turboModule)->getValue(
     rt,
-    count <= 0 || args[0].isNull() || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asNumber()),
-    count <= 1 || args[1].isNull() || args[1].isUndefined() ? std::nullopt : std::make_optional(args[1].asString(rt)),
-    count <= 2 || args[2].isNull() || args[2].isUndefined() ? std::nullopt : std::make_optional(args[2].asObject(rt))
+    count <= 0 || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asNumber()),
+    count <= 1 || args[1].isUndefined() ? std::nullopt : std::make_optional(args[1].asString(rt)),
+    count <= 2 || args[2].isUndefined() ? std::nullopt : std::make_optional(args[2].asObject(rt))
   );
 }
 static jsi::Value __hostFunction_NativeSampleTurboModuleOptionalCxxSpecJSI_getValueWithCallback(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
   static_cast<NativeSampleTurboModuleOptionalCxxSpecJSI *>(&turboModule)->getValueWithCallback(
     rt,
-    count <= 0 || args[0].isNull() || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asObject(rt).asFunction(rt))
+    count <= 0 || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asObject(rt).asFunction(rt))
   );
   return jsi::Value::undefined();
 }
 static jsi::Value __hostFunction_NativeSampleTurboModuleOptionalCxxSpecJSI_getValueWithPromise(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
   return static_cast<NativeSampleTurboModuleOptionalCxxSpecJSI *>(&turboModule)->getValueWithPromise(
     rt,
-    count <= 0 || args[0].isNull() || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asBool())
+    count <= 0 || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asBool())
   );
 }
 
diff --git a/packages/react-native-codegen/src/generators/modules/GenerateModuleCpp.js b/packages/react-native-codegen/src/generators/modules/GenerateModuleCpp.js
index 2fa915d1943..8928c0e8566 100644
--- a/packages/react-native-codegen/src/generators/modules/GenerateModuleCpp.js
+++ b/packages/react-native-codegen/src/generators/modules/GenerateModuleCpp.js
@@ -132,6 +132,12 @@ function serializeArg(
     const val = `args[${index}]`;
     const expression = callback(val);
 
+    // param?: T
+    if (optional && !nullable) {
+      // throw new Error('are we hitting this case? ' + moduleName);
+      return `count <= ${index} || ${val}.isUndefined() ? std::nullopt : std::make_optional(${expression})`;
+    }
+
     // param: ?T
     // param?: ?T
     if (nullable || optional) {
diff --git a/packages/react-native-codegen/src/generators/modules/__tests__/__snapshots__/GenerateModuleCpp-test.js.snap b/packages/react-native-codegen/src/generators/modules/__tests__/__snapshots__/GenerateModuleCpp-test.js.snap
index 7be9050fc36..dcfbcaa3e16 100644
--- a/packages/react-native-codegen/src/generators/modules/__tests__/__snapshots__/GenerateModuleCpp-test.js.snap
+++ b/packages/react-native-codegen/src/generators/modules/__tests__/__snapshots__/GenerateModuleCpp-test.js.snap
@@ -61,7 +61,7 @@ static jsi::Value __hostFunction_NativeSampleTurboModuleCxxSpecJSI_optionalMetho
     rt,
     count <= 0 ? throw jsi::JSError(rt, \\"Expected argument in position 0 to be passed\\") : args[0].asObject(rt),
     count <= 1 ? throw jsi::JSError(rt, \\"Expected argument in position 1 to be passed\\") : args[1].asObject(rt).asFunction(rt),
-    count <= 2 || args[2].isNull() || args[2].isUndefined() ? std::nullopt : std::make_optional(args[2].asObject(rt).asArray(rt))
+    count <= 2 || args[2].isUndefined() ? std::nullopt : std::make_optional(args[2].asObject(rt).asArray(rt))
   );
   return jsi::Value::undefined();
 }
@@ -243,7 +243,7 @@ static jsi::Value __hostFunction_NativeSampleTurboModuleCxxSpecJSI_getValueWithP
 static jsi::Value __hostFunction_NativeSampleTurboModuleCxxSpecJSI_getWithWithOptionalArgs(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
   auto result = static_cast<NativeSampleTurboModuleCxxSpecJSI *>(&turboModule)->getWithWithOptionalArgs(
     rt,
-    count <= 0 || args[0].isNull() || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asBool())
+    count <= 0 || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asBool())
   );
   return result ? jsi::Value(std::move(*result)) : jsi::Value::null();
 }
@@ -591,7 +591,7 @@ static jsi::Value __hostFunction_NativeSampleTurboModuleCxxSpecJSI_getValueWithP
 static jsi::Value __hostFunction_NativeSampleTurboModuleCxxSpecJSI_getValueWithOptionalArg(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
   return static_cast<NativeSampleTurboModuleCxxSpecJSI *>(&turboModule)->getValueWithOptionalArg(
     rt,
-    count <= 0 || args[0].isNull() || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asObject(rt))
+    count <= 0 || args[0].isUndefined() ? std::nullopt : std::make_optional(args[0].asObject(rt))
   );
 }
 static jsi::Value __hostFunction_NativeSampleTurboModuleCxxSpecJSI_getEnums(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {