Im an android /java native coder
And a swift/xcode native coder
But I also expert in angular ...
Sooooooo ???
Shall I go android/kotlin+ios/swiftUI
Or ionic angular capacitor ?

I guess that depends on what you’re building and the pros and cons of either approach in that context.

However, as a rule of thumb, I’d steer clear from using JS for mobile app dev. It just absolutely doesn’t belong there. If, as in many scenarios it would, it’s the better approach to wora, there are approaches for both Kotlin and Swift, which make it possible (KMM and Scade respectively), however I am uncertain of the level of maturity of such approaches.

Kotlin Jetpack Compose and SwiftUI.
It might be hard to learn both at the same time but they are awesome!