Tested clients
BeetstreamNext should be compatible with virtually any Subsonic/OpenSubsonic/Navidrome client.
The Navidrome project maintains a nice list of existing clients here.
I specifically tested it with:
Android
iOS
Desktop
Note
Not seeing a client here doesn’t mean it won’t work, this is just what I have manually verified. If you confirm another client works well, consider opening a PR or an Issue to let me know :)