diff --git a/packages/react-native/ReactAndroid/api/ReactAndroid.api b/packages/react-native/ReactAndroid/api/ReactAndroid.api
index 14c0f00797b..91f7ca364ca 100644
--- a/packages/react-native/ReactAndroid/api/ReactAndroid.api
+++ b/packages/react-native/ReactAndroid/api/ReactAndroid.api
@@ -2626,14 +2626,6 @@ public class com/facebook/react/fabric/events/FabricEventEmitter : com/facebook/
 	public fun receiveTouches (Ljava/lang/String;Lcom/facebook/react/bridge/WritableArray;Lcom/facebook/react/bridge/WritableArray;)V
 }
 
-public abstract interface class com/facebook/react/fabric/interop/UIBlock {
-	public abstract fun execute (Lcom/facebook/react/fabric/interop/UIBlockViewResolver;)V
-}
-
-public abstract interface class com/facebook/react/fabric/interop/UIBlockViewResolver {
-	public abstract fun resolveView (I)Landroid/view/View;
-}
-
 public abstract interface class com/facebook/react/fabric/mounting/LayoutMetricsConversions {
 	public static fun getMaxSize (I)F
 	public static fun getMinSize (I)F
diff --git a/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/fabric/interop/UIBlock.kt b/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/fabric/interop/UIBlock.kt
index 702d096ea66..020ce08340a 100644
--- a/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/fabric/interop/UIBlock.kt
+++ b/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/fabric/interop/UIBlock.kt
@@ -9,6 +9,8 @@
 
 package com.facebook.react.fabric.interop
 
+import com.facebook.react.common.annotations.UnstableReactNativeAPI
+
 /**
  * Interop Interface added to support `addUiBlock` and `prependUIBlock` methods in Fabric.
  * Historically those methods were only available in `UIManagerModule` (Paper, the old renderer).
@@ -17,6 +19,7 @@ package com.facebook.react.fabric.interop
  * @deprecated When developing new libraries for Fabric you should instead use [UIManagerListener]
  *   or View Commands to achieve a same results.
  */
+@UnstableReactNativeAPI
 @Deprecated("Use UIManagerListener or View Commands instead of addUIBlock and prependUIBlock.")
 public fun interface UIBlock {
   /**
diff --git a/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/fabric/interop/UIBlockViewResolver.kt b/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/fabric/interop/UIBlockViewResolver.kt
index 7fd8389b858..5cbcd2f2f8f 100644
--- a/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/fabric/interop/UIBlockViewResolver.kt
+++ b/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/fabric/interop/UIBlockViewResolver.kt
@@ -8,6 +8,7 @@
 package com.facebook.react.fabric.interop
 
 import android.view.View
+import com.facebook.react.common.annotations.UnstableReactNativeAPI
 
 /**
  * This interface is used as receiver parameter for [UIBlock].
@@ -17,6 +18,7 @@ import android.view.View
  * @deprecated When developing new libraries for Fabric you should instead use [UIManagerListener]
  *   or View Commands to achieve a same results.
  */
+@UnstableReactNativeAPI
 @Deprecated("Use UIManagerListener or View Commands instead of addUIBlock and prependUIBlock.")
 public interface UIBlockViewResolver {
   /**
diff --git a/packages/react-native/ReactAndroid/src/test/java/com/facebook/react/bridge/interop/FakeRCTEventEmitter.kt b/packages/react-native/ReactAndroid/src/test/java/com/facebook/react/bridge/interop/FakeRCTEventEmitter.kt
index dd8b7ac6989..46f96d0b6bf 100644
--- a/packages/react-native/ReactAndroid/src/test/java/com/facebook/react/bridge/interop/FakeRCTEventEmitter.kt
+++ b/packages/react-native/ReactAndroid/src/test/java/com/facebook/react/bridge/interop/FakeRCTEventEmitter.kt
@@ -11,8 +11,10 @@ package com.facebook.react.bridge.interop
 
 import com.facebook.react.bridge.WritableArray
 import com.facebook.react.bridge.WritableMap
+import com.facebook.react.common.annotations.UnstableReactNativeAPI
 import com.facebook.react.uimanager.events.RCTEventEmitter
 
+@UnstableReactNativeAPI
 class FakeRCTEventEmitter : RCTEventEmitter {
 
   override fun receiveEvent(targetReactTag: Int, eventName: String, event: WritableMap?) = Unit
diff --git a/packages/react-native/ReactAndroid/src/test/java/com/facebook/react/bridge/interop/InteropModuleRegistryTest.kt b/packages/react-native/ReactAndroid/src/test/java/com/facebook/react/bridge/interop/InteropModuleRegistryTest.kt
index 3d9c188b250..97fa6ee9e0a 100644
--- a/packages/react-native/ReactAndroid/src/test/java/com/facebook/react/bridge/interop/InteropModuleRegistryTest.kt
+++ b/packages/react-native/ReactAndroid/src/test/java/com/facebook/react/bridge/interop/InteropModuleRegistryTest.kt
@@ -19,6 +19,7 @@ import org.junit.Assert.assertTrue
 import org.junit.Before
 import org.junit.Test
 
+@OptIn(UnstableReactNativeAPI::class)
 class InteropModuleRegistryTest {
 
   lateinit var underTest: InteropModuleRegistry
diff --git a/packages/react-native/ReactAndroid/src/test/java/com/facebook/react/fabric/internal/interop/InteropUiBlockListenerTest.kt b/packages/react-native/ReactAndroid/src/test/java/com/facebook/react/fabric/internal/interop/InteropUiBlockListenerTest.kt
index d875aa83ef8..e61021c5b2c 100644
--- a/packages/react-native/ReactAndroid/src/test/java/com/facebook/react/fabric/internal/interop/InteropUiBlockListenerTest.kt
+++ b/packages/react-native/ReactAndroid/src/test/java/com/facebook/react/fabric/internal/interop/InteropUiBlockListenerTest.kt
@@ -7,10 +7,12 @@
 
 package com.facebook.react.fabric.internal.interop
 
+import com.facebook.react.common.annotations.UnstableReactNativeAPI
 import com.facebook.testutils.fakes.FakeUIManager
 import org.junit.Assert.assertEquals
 import org.junit.Test
 
+@OptIn(UnstableReactNativeAPI::class)
 class InteropUiBlockListenerTest {
 
   @Test
diff --git a/packages/react-native/ReactAndroid/src/test/java/com/facebook/testutils/fakes/FakeUIManager.kt b/packages/react-native/ReactAndroid/src/test/java/com/facebook/testutils/fakes/FakeUIManager.kt
index 65db10c1e85..520119603b6 100644
--- a/packages/react-native/ReactAndroid/src/test/java/com/facebook/testutils/fakes/FakeUIManager.kt
+++ b/packages/react-native/ReactAndroid/src/test/java/com/facebook/testutils/fakes/FakeUIManager.kt
@@ -15,8 +15,10 @@ import com.facebook.react.bridge.ReadableMap
 import com.facebook.react.bridge.UIManager
 import com.facebook.react.bridge.UIManagerListener
 import com.facebook.react.bridge.WritableMap
+import com.facebook.react.common.annotations.UnstableReactNativeAPI
 import com.facebook.react.fabric.interop.UIBlockViewResolver
 
+@OptIn(UnstableReactNativeAPI::class)
 class FakeUIManager : UIManager, UIBlockViewResolver {
 
   // The number of times resolveView was called