Roon knows how to support Apple Music and would be pleased to provide the same experience as the Qobuz/Tidal integration for Apple Music. If that is what you want then you are pushing against an open door as far as Roon is concerned and should try to persuade Apple.
If you want some type of lesser integration in Roon of Apple Music, Roon have said about music services generally they don’t see the point without the deep integration enabling all the clickable metadata. There are plenty of music player programs out there already.