As we know, the core of react-native uses Java and Objective-C to integrate with the native platform, however it is very common new projects / resources developed in Kotlin and Swift.
Another thing is that the technologies have interesting new ways to create UI with Jetpack Compose and SwiftUI.
It could be very interesting if the docs explained a lot more how to integrate this type of technologies in react-native. I believe it will be easier for the developer to create your own integrations or custom libraries giving more power to their projetcs.