The majority of developers I know loves SwiftUI. Infact, I started using Swift and XCode just because of SwiftUI. It is such a powerful and natural way to build user interfaces.
@OP
I suspect that you’ll ever be able to export something Xojo to another platform, since they are all competitors and Xojo tries to keep you save and sound within its own walls (what I find completely relatable).
So either you deal with the clunky Xojo Mobile Platform or you do things in Xcode. Both together won’t happen I suppose.