Dopes anyone know any good mobile app frameworks that are open source. I would like to be able to develop from windows, but move over to a mac (I own one) when I build for IOS. I want raw NATIVE ui provided by SwiftUI and whatever android has (material design I think).


Godot?
Its gaming framework, but has all the classic UI controls, its open source and multi platform.
I think that “native” controls require also native toolkits and SDKs, so you lose portability.