All of your apps and watch faces were found through the Galaxy Store. The GW 4, GW 5, and GW6 series use the Android Wear OS. All of the apps and watch faces are found in the Android Play store. So you won't be able to directly use the watch faces from the Galaxy Store on the GW 5 Pro.
1. Log out your account and log in again. 2. Uninstall Teams and re-install it again. If you try the two suggestions but nothing works, please be kindly to check if Teams work normally on your computer. If Teams works well on your PC, it means nothing wrong with your account.
Tap the Install button. Install apps directly on your Samsung Galaxy Watch 4. Since the Watch 4 now runs on Wear OS it has the Play Store app available for you to use. Swipe up from the watch home
CBSAM.