Some comments regarding GPay on the watch:
- There's no relation between GPay for phones and those for Wear OS - if there is an official support for given country it is not ( and for many EU countries it is the case) always valid for watches.
- GPay app is installed by default on the watch, but it is hidden for the countries without official support. If you disable Wi-Fi on the watch and start a VPN on your phone, the app should appear in a while.
- Even if you are using Permanent proxy, sometimes GPay is disabled after update of some related Google apps - Services framework, Play services, Google main app. In this case manual install of this Google Pay Wear app version and after watch restart it appeared again.
Cool, I find the first point very interesting, I will look into it. When I upload the post about Gpay to the first post I will include with your permission your consideration and your 2 tricks.