Mindfulness app missing on my Applewatch
How do I reinstall?
Apple Watch Series 6, watchOS 8
Question marked as
All I can suggest its that you unpair and pair your watch again and restore from the backup just created. This should result in no loss of data. It deletes all temp and corrupted files and re-indexes the file system.
Unpair and erase your Apple Watch - Apple Support
Set up your Apple Watch - Apple Support