Google Play-Dienste

[AnotherElk]

@kurt

So, what have I to do to go back to the original microG of /e/OS?

I think it should still be there, Aurora Store shouldn’t be able to replace it.
You can try Settings - System - Advanced - MicroG - Self-Check.

@kurt

How to deal with this?

@AnotherElk

In this case be sure to use Aurora Store’s Blacklist manager to blacklist every App which you didn’t install via Aurora Store (yes, these are many) to not confuse the system, Aurora Store or yourself with updates which Aurora Store shouldn’t offer .