Difficulty in integration of unity with flutter

I’m integrating Unity into my Flutter project using the Flutter Unity Widget, but I’m encountering issues with both rendering and communication between Flutter and Unity. I’ve followed the setup instructions closely, but Unity fails to render within the Flutter app, and there seems to be a breakdown in communication between the two platforms. I’m using Flutter version 34 and Unity version 2022.3.43.F1 on Android/iOS, and I would appreciate any advice on troubleshooting or common pitfalls others have encountered during this integration. Any help would be greatly appreciated!