The latest beta version of Apple Music for Android includes screens prompting users to import their playlists from other services, such as Spotify.
Apple Music and Spotify icons
Music tracks themselves do not move between streaming services, unlike moving old iTunes libraries around. Instead, what has been possible if a little fiddly, is to move playlists.
Apple appears to be trialling a method of helping users do this within the Apple Music app, instead of via hit and miss alternatives. It appears to be doing this in collaboration with one of the more successful options, a service called SongShift.
At present, the feature is only in the Android version of Apple Music, only in the latest beta of the app, and then seemingly only for some number of users. Not even everyone on the beta is seeing the feature -- and those who are say that it isn't working yet.
So it really barely counts as a beta test, it's more like an alpha test being presented randomly to users to gauge interest or reactions.
However, if the feature makes it out of beta and becomes available for all Apple Music users on Android, it seems inevitable that it will come to the iPhone too. It's unusual to see an incomplete alpha test and to not see it first on an iPhone, but Apple Music Classical did launch on Android before it came to the iPad.
Separately, in 2020, the SongShift app behind this new feature, was threatened by Spotify with having its access to the service revoked. SongShift announced it would drop Spotify transfers from its app's version 5.1.2. but by version 5.2.3, the feature was back.