Hi,
Unfortunately as we don’t fork Aurora we are dependant on upstream updates, we can’t do anything about it unless one day we decide to fork it and create our own version.
Does the problem really lie in only the Aurora Store app? I hadn’t assumed Custom OS makers to be required to import some sort of public key to authorize a store app to install stuff without intervention.
I think it is some sort of background permission / authentication issue with how it works with the Anonymous login to the play store.
Only guessing it is related, but at least for me I have to force stop Aurora after a day or else when I try to install a new app it says “unavailable”. But with stop and restart it then shows as available and installs fine.
Possibly auto updates also indirectly get blocked by the same permission / authentication issue.