Did you install the watch face on both watch & mobile?
Wear OS 2.0/3.0 does not sync the application automatically from mobile to watch (a lot of users blame Google for that…). You have to do this manually, by going in the Google Play Store of both devices.
Please install the application on your watch as well.
To do that, open the Google Play Store on your watch, and you can either:
- scroll down to see if the Google Play Store suggests you the wear app installed on your mobile that is missing on your watch
- search for the watch face by hitting the search icon on top
And then, install the companion app on mobile for a full experience.