diff --git a/packages/react-native-codegen/src/CodegenSchema.js b/packages/react-native-codegen/src/CodegenSchema.js
index a10b8d29510..c66dc81b9b1 100644
--- a/packages/react-native-codegen/src/CodegenSchema.js
+++ b/packages/react-native-codegen/src/CodegenSchema.js
@@ -148,11 +148,11 @@ export type FunctionTypeAnnotationParamTypeAnnotation =
     |}>
   | $ReadOnly<{|
       type: 'ArrayTypeAnnotation',
-      elementType: FunctionTypeAnnotationParamTypeAnnotation,
+      elementType: ?FunctionTypeAnnotationParamTypeAnnotation,
     |}>
   | $ReadOnly<{|
       type: 'ObjectTypeAnnotation',
-      properties: $ReadOnlyArray<ObjectParamTypeAnnotation>,
+      properties: ?$ReadOnlyArray<ObjectParamTypeAnnotation>,
     |}>
   | $ReadOnly<{|
       type: 'FunctionTypeAnnotation',
@@ -174,7 +174,7 @@ export type FunctionTypeAnnotationReturn =
     |}>
   | $ReadOnly<{|
       type: 'ArrayTypeAnnotation',
-      elementType: FunctionTypeAnnotationReturnArrayElementType,
+      elementType: ?FunctionTypeAnnotationReturnArrayElementType,
     |}>
   | $ReadOnly<{|
       type: 'GenericPromiseTypeAnnotation',
@@ -182,7 +182,7 @@ export type FunctionTypeAnnotationReturn =
     |}>
   | $ReadOnly<{|
       type: 'ObjectTypeAnnotation',
-      properties: $ReadOnlyArray<ObjectParamTypeAnnotation>,
+      properties: ?$ReadOnlyArray<ObjectParamTypeAnnotation>,
     |}>;
 
 export type FunctionTypeAnnotationParam = $ReadOnly<{|
diff --git a/packages/react-native-codegen/src/parsers/flow/modules/__test_fixtures__/fixtures.js b/packages/react-native-codegen/src/parsers/flow/modules/__test_fixtures__/fixtures.js
index 8342d6a1d77..d94178d74e4 100644
--- a/packages/react-native-codegen/src/parsers/flow/modules/__test_fixtures__/fixtures.js
+++ b/packages/react-native-codegen/src/parsers/flow/modules/__test_fixtures__/fixtures.js
@@ -291,6 +291,29 @@ export interface Spec extends TurboModule {
 
 export default TurboModuleRegistry.getEnforcing<Spec>('SampleTurboModule');
 
+`;
+const NATIVE_MODULE_WITH_ARRAY_WITH_UNION_AND_TOUPLE = `
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ * @format
+ */
+
+'use strict';
+
+import type {TurboModule} from '../RCTExport';
+import * as TurboModuleRegistry from '../TurboModuleRegistry';
+
+export interface Spec extends TurboModule {
+  +getArray: (arg: Array<[string, string]>) => Array<string | number | boolean>;
+}
+
+export default TurboModuleRegistry.getEnforcing<Spec>('SampleTurboModule');
+
 `;
 
 const NATIVE_MODULE_WITH_ARRAY_WITH_ALIAS = `
@@ -400,6 +423,7 @@ export default TurboModuleRegistry.getEnforcing<Spec>('SampleTurboModule');
 
 module.exports = {
   NATIVE_MODULE_WITH_OBJECT_WITH_OBJECT_DEIFNED_IN_FILE_AS_PROPERTY,
+  NATIVE_MODULE_WITH_ARRAY_WITH_UNION_AND_TOUPLE,
   NATIVE_MODULE_WITH_WITH_FLOAT_AND_INT32,
   NATIVE_MODULE_WITH_WITH_ALIASES,
   NATIVE_MODULE_WITH_PROMISE,
diff --git a/packages/react-native-codegen/src/parsers/flow/modules/__tests__/__snapshots__/module-parser-test.js.snap b/packages/react-native-codegen/src/parsers/flow/modules/__tests__/__snapshots__/module-parser-test.js.snap
index 3dac11c9d9c..41c15d7d216 100644
--- a/packages/react-native-codegen/src/parsers/flow/modules/__tests__/__snapshots__/module-parser-test.js.snap
+++ b/packages/react-native-codegen/src/parsers/flow/modules/__tests__/__snapshots__/module-parser-test.js.snap
@@ -73,6 +73,42 @@ Object {
 }
 `;
 
+exports[`RN Codegen Flow Parser can generate fixture NATIVE_MODULE_WITH_ARRAY_WITH_UNION_AND_TOUPLE 1`] = `
+Object {
+  "modules": Object {
+    "NativeSampleTurboModule": Object {
+      "nativeModules": Object {
+        "SampleTurboModule": Object {
+          "properties": Array [
+            Object {
+              "name": "getArray",
+              "typeAnnotation": Object {
+                "optional": false,
+                "params": Array [
+                  Object {
+                    "name": "arg",
+                    "nullable": false,
+                    "typeAnnotation": Object {
+                      "elementType": undefined,
+                      "type": "ArrayTypeAnnotation",
+                    },
+                  },
+                ],
+                "returnTypeAnnotation": Object {
+                  "elementType": undefined,
+                  "type": "ArrayTypeAnnotation",
+                },
+                "type": "FunctionTypeAnnotation",
+              },
+            },
+          ],
+        },
+      },
+    },
+  },
+}
+`;
+
 exports[`RN Codegen Flow Parser can generate fixture NATIVE_MODULE_WITH_BASIC_ARRAY 1`] = `
 Object {
   "modules": Object {
diff --git a/packages/react-native-codegen/src/parsers/flow/modules/methods.js b/packages/react-native-codegen/src/parsers/flow/modules/methods.js
index 1d0ffb3dac2..b66f52bbbdc 100644
--- a/packages/react-native-codegen/src/parsers/flow/modules/methods.js
+++ b/packages/react-native-codegen/src/parsers/flow/modules/methods.js
@@ -55,7 +55,7 @@ function getElementTypeForArrayOrObject(
   arrayParam,
   paramName,
   types: TypeMap,
-): FunctionTypeAnnotationParamTypeAnnotation {
+): FunctionTypeAnnotationParamTypeAnnotation | typeof undefined {
   const typeAnnotation = getValueFromTypes(arrayParam, types);
   const type =
     typeAnnotation.type === 'GenericTypeAnnotation'
@@ -113,6 +113,9 @@ function getElementTypeForArrayOrObject(
       return {
         type: 'FloatTypeAnnotation',
       };
+    case 'TupleTypeAnnotation':
+    case 'UnionTypeAnnotation':
+      return undefined;
     default:
       throw new Error(
         `Unsupported param type for method "${name}", param "${paramName}". Found ${type}`,