I’ve had the same problem for 2 days. 1 Watch Face from me was published on Google, but not approved for Wear OS without proper explanation.
Another watchface was already activated for Wear OS, was downloaded several times, but was rejected after a small update (new buttons) on Wear OS. I didn’t even get an email this time. I only noticed that by accident.
Strangely, this problem has only appeared since the WatchFaceStudio update. Of course I don’t know if that has anything to do with that.
The fact is, compatibility keeps getting worse instead of better.
Either the watch faces are not found at all, or you can often only download them via the PC or laptop.