leo on Nostr: Depends on what you need/want. To get the most os native look an feel react native is ...

Depends on what you need/want.
To get the most os native look an feel react native is great because native components get renderd.
If you want more custom ui and control but not quite a game engine flutter is nice. Especially if you pair it with rust for business logic https://pub.dev/packages/flutter_rust_bridge

If you want even more fancy animations=> gameEngine like unity, unreal