Disclaimer: I wrote a book about creating apps, end-to-end, and I use Flutter https://news.ycombinator.com/item?id=38433668

It's the same thing with the Flutter ecosystem. Half of the libraries I use in my existing projects haven't been updated in a year (they were active when I picked them). They still work, but considering Flutter (and Dart) move so fast, it gives me the heebie-jeebies.

If you're comfortable with JS, go for it (React Native). But before you commit, think ahead of the must-have UIUX features for your app and build a PoC. Don't be surprised when you can use built-in/stock camera access in less than an hour, but you need hundreds of hours to make a custom camera screen.