Apple watch can't enter passcode
Apple watch partially
lost touch screen
Question marked as
With your watch near your iPhone, open the Apple Watch app on your iPhone, tap Passcode, then turn on Unlock with iPhone.
To fix the watch screen, the first (and simplest) thing to try if something isn’t working right is to restart your Apple Watch and its paired iPhone. If necessary (device not responding), try a forced restart. Both methods can be found here:
How to restart your Apple Watch - Apple Support
Restart your iPhone - Apple Support
If that doesn't help, the next steps would be to 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
If all else fails, for repair & service:
watch Repair - Official Apple Support
watch Service Pricing - Apple Support