Is non-trivial RN still just bad on Android?

I've been building a new app over the last couple months. I've developed it entirely with iOS up until now. I'm using all the fancy new stuff - new arch with lots of fun gesture-handler and reanimated interactivity.

The app is beautiful and smooth on iOS.

Anyway, today I got it running on Android. It stutters and pops around and things don't scroll properly (and then do)... the gesture handlers are overflowing their target areas bubbling up to parent elements. Sometimes the keyboard avoiding view works, sometimes it doesn't, etc etc.

I knew I'd have a bit of work smoothing it out but it is significantly and obviously so much worse.

What am I doing wrong?