diff --git a/packages/react-native-renderer/src/ReactNativePublicCompat.js b/packages/react-native-renderer/src/ReactNativePublicCompat.js
index 38e820dc30f0c..c38165f956ba3 100644
--- a/packages/react-native-renderer/src/ReactNativePublicCompat.js
+++ b/packages/react-native-renderer/src/ReactNativePublicCompat.js
@@ -8,8 +8,6 @@
  */
 
 import type {Node, HostComponent} from './ReactNativeTypes';
-import type {PublicInstance as FabricPublicInstance} from './ReactFiberConfigFabric';
-import type {PublicInstance as PaperPublicInstance} from './ReactFiberConfigNative';
 import type {ElementRef, ElementType} from 'react';
 
 // Modules provided by RN:
@@ -225,6 +223,11 @@ export function getNodeFromInternalInstanceHandle(
   );
 }
 
+// Should have been PublicInstance from ReactFiberConfigFabric
+type FabricPublicInstance = mixed;
+// Should have been PublicInstance from ReactFiberConfigNative
+type PaperPublicInstance = HostComponent<mixed>;
+
 // Remove this once Paper is no longer supported and DOM Node API are enabled by default in RN.
 export function isChildPublicInstance(
   parentInstance: FabricPublicInstance | PaperPublicInstance,
@@ -251,8 +254,10 @@ export function isChildPublicInstance(
     }
 
     const parentInternalInstanceHandle =
+      // $FlowExpectedError[incompatible-call] PublicInstance from ReactNativeTypes is opaque, treat it as PublicInstance from ReactFiberConfigFabric.
       getInternalInstanceHandleFromPublicInstance(parentInstance);
     const childInternalInstanceHandle =
+      // $FlowExpectedError[incompatible-call] PublicInstance from ReactNativeTypes is opaque, treat it as PublicInstance from ReactFiberConfigFabric.
       getInternalInstanceHandleFromPublicInstance(childInstance);
 
     // Fabric
diff --git a/packages/react-native-renderer/src/ReactNativeTypes.js b/packages/react-native-renderer/src/ReactNativeTypes.js
index f2ae65a82c380..c61ee86be4f86 100644
--- a/packages/react-native-renderer/src/ReactNativeTypes.js
+++ b/packages/react-native-renderer/src/ReactNativeTypes.js
@@ -191,6 +191,10 @@ export type ReactNativeType = {
   findNodeHandle<TElementType: ElementType>(
     componentOrHandle: ?(ElementRef<TElementType> | number),
   ): ?number,
+  isChildPublicInstance(
+    parent: PublicInstance | HostComponent<mixed>,
+    child: PublicInstance | HostComponent<mixed>,
+  ): boolean,
   dispatchCommand(
     handle: ElementRef<HostComponent<mixed>>,
     command: string,
@@ -229,6 +233,7 @@ export type ReactFabricType = {
     command: string,
     args: Array<mixed>,
   ): void,
+  isChildPublicInstance(parent: PublicInstance, child: PublicInstance): boolean,
   sendAccessibilityEvent(
     handle: ElementRef<HostComponent<mixed>>,
     eventType: string,