Apple Watch Music App Always On. In this mode, the time is always visible, along with your watch face or the most recent active app. Reduce your storage allowance for synced photos:
Then use the music app on your watch to selected playlists, albums etc and controls to select tracks, increase volume etc. Is an unresolved bug that means manually editing sleep times doesn’t always work. Its very intuitively straight forward.
Developer response , to reinstall the app please go to app store on your watch, not phone.
And play your music enjoy! Tidal and apple music limit you to only actively listening to music on a single device at a time. To preserve battery life, the display dims when your wrist is down, or by a quick gesture of covering the display with your hand. Plus, it's always being updated, provided that you are still using apple music for your primary music streaming needs.