The #GOG Galaxy app integrations with other digital storefronts seems to be a failed experiment. It's never worked well - constantly logged me out, or even failed to log in in the first place.
I probably need to give #Playnite another go. My big problem with that app is that it didn't consolidate entries for games owned on multiple storefronts. I created a support ticket once, and I don't think they really appreciated what I was asking for, which kind of soured me on it as well.