Kotlin multiplatform has been around for some time if you want that. But I guess it makes sense to be able to approach it from the other end as well if you're mainly an iOS shop.
It's the only approach that can be taken, as Android being open source can make Swift a first class supported language. Apple will be apple.
Unless I am also mistaken, they are seeking to make a supported language to android development.
Which will save mobile devs having to learn two languages, and also allow reuse of code.