I have just read a bit into the Kolin documentation and get the impression that it should be possible to write a Xojo program that can access the Kotlin Command Line Compiler to create Android programs.
Do I suspect correctly that this is exactly what Xojo does behind the scenes? So we write Xojo code, which is translated into Kolin code and then translated into an Android app using the Kotlin Command Line Compiler?
I actually doubt seriously that Xojo would be going that route. What you described is actually called a Transpiler (I am in the process of writing one that creates Swift code, not from an Xojo project, but the same idea)