Typical WearOS issues (Update: 2023-01-26)
1.) The Play Store on your phone tells you that the app is already installed, but you can not find it on your watch?
SOLUTION: Open the watch face list directly on your watch. For that, click at the center of your watch and hold it for 1 second. Scroll to the end of the whole watch face list and click the more watch faces button. There you should find all new installed watch faces.
2.) The Play Store on your phone tells you that the app is already installed, but the Play Store directly on your watch shows you a price tag?
SOLUTION: Don't pay twice! Instead, open the Play Store directly on your watch. Sign out of the Play Store and sign in again. This will force the Play Store to sync.
2.) Heart Rate does not work properply?
SOLUTION: The best way is just to restart your watch. Turn it off and on.
Customization Problems with the Samsung Wearable App (Update: 2023-01-26)
For long time the Wearable App had a lot of problems with complex and heavy customizable watch faces. When you had tried to customize a watch face you have seen a loading animation but nothing happend. This problem was fixed by Samsung/Google with the latest update on the WCS (Watch Core Service).
What we currently now, that you have to click sometimes more as once to get into the customization menu and its a relativly slow on the phone. Samsung is working on it.