I was about to answer this, but decided I didn’t want that information in public.
However, the bank I use, which is a largish one, has an app that I’ve installed with the aurora store without microg or google play services on divestos and it complains that it won’t work without gsf, but it works fine after clicking ok.
I’ve been self-hosting a bunch of stuff for over a decade now, and have not had that issue.
Except for a matrix server with open registration for a community that others not in the community started to use.