the thread you link is rather nebulous (install x apk from z). Banks advice it not the worst - having a stockrom phone for incompatible apps.
While it’s not solving the issue, I think it be good to classify why the app doesn’t work. You’ll need to look into the log output of “adb logcat” (see howto) while interacting to see what exactly is failing and attribute or file a new bug at Issues · microg/GmsCore · GitHub - a bbva entry is missing to date.