I cannot find the companion app to be able to get watch faces
You could try this:
On your phone, open “Galaxy Wearable” App
Scroll down until you find the “Galaxy Store” icon and select it
At the top of the Galaxy Store screen, select the magnifying glass icon to open the search bar.
Type in “Facer Companion” and search.
Hopefully it will show up ( it just did for me when I tested the above steps )
I hope it helps.
If I go straight to the Galaxy Store from the phone ( ie. without calling it from the Galaxy Wearable App ) I can not find Facer Companion using the search function. It only works for me if I follow the steps above. Strange