I don't know the official answer, but anecdotally it's yes -- I'm working on a KMM app and just upgraded to Kotlin 1.8 this week without issue. The only caveat is that I didn't switch to the new source set layout yet because I'm only running stable Android Studio (2022.1.1) which doesn't support it per the note at
https://kotlinlang.org/docs/whatsnew18.html#configuration-and-setup