Flutter is worth looking into, and is currently being pushed quite a lot by Google as well. Key benefit over Android development with Kotlin or Java is the possibility using the same codebase for both iOS and android apps.

I’ve tried Flutter a little and personally still favour React native over it, mostly because of my web design and development background. However a lot of my colleagues and friends are leaning heavily towards Flutter in their projects because of its better developer experience.

https://flutter.io