is brownfield Android Fragment loading supported?

[francois-pasquier]

Trying to load a react native fragment with the new architecture results in the error below.

This is with the latest 0.74.1 react native template with a minor modification of loading a new Activity containing the following fragment loading code:

            val reactNativeFragment = ReactFragment.Builder()
                .setComponentName("HelloRN")
                .setFabricEnabled(true)
                .build()
            childFragmentManager
                .beginTransaction()
                .add(R.id.reactNativeFragment, reactNativeFragment)
                .commit()

java.lang.NullPointerException: Attempt to invoke interface method 'com.facebook.react.interfaces.fabric.ReactSurface com.facebook.react.ReactHost.createSurface(android.content.Context, java.lang.String, android.os.Bundle)' on a null object reference
                                                                                                    	at com.facebook.react.ReactDelegate.loadApp(ReactDelegate.java:281)
                                                                                                    	at com.facebook.react.ReactDelegate.loadApp(ReactDelegate.java:273)
                                                                                                    	at com.facebook.react.ReactFragment.onCreateView(ReactFragment.java:95)
                                                                                                    	at androidx.fragment.app.Fragment.performCreateView(Fragment.java:3114)
                                                                                                    	at androidx.fragment.app.FragmentStateManager.createView(FragmentStateManager.java:557)
                                                                                                    	at androidx.fragment.app.FragmentStateManager.moveToExpectedState(FragmentStateManager.java:272)
                                                                                                    	at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:1943)
                                                                                                    	at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:1839)
                                                                                                    	at androidx.fragment.app.FragmentManager.execPendingActions(FragmentManager.java:1782)
                                                                                                    	at androidx.fragment.app.FragmentManager$5.run(FragmentManager.java:565)
                                                                                                    	at android.os.Handler.handleCallback(Handler.java:958)
                                                                                                    	at android.os.Handler.dispatchMessage(Handler.java:99)
                                                                                                    	at android.os.Looper.loopOnce(Looper.java:205)
                                                                                                    	at android.os.Looper.loop(Looper.java:294)
                                                                                                    	at android.app.ActivityThread.main(ActivityThread.java:8176)
                                                                                                    	at java.lang.reflect.Method.invoke(Native Method)
                                                                                                    	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:552)
                                                                                                    	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:971)