Unable to answer "Are these opening hours still correct?" – on level 0: Marktküche BILLA (Restaurant) – way/1165180063 via StreetComplete 61.3:

It's now part of Billa Plus with two deposit return machines.

Attached photo(s):
https://streetcomplete.app/p/311076.jpg

Unable to answer "How many cars can be charged here at the same time?" – Tesla Supercharger (Charging Station) – node/2871070156 via StreetComplete 61.3:

They have been replaced by 4x 150kW charger from a private company. They are open to public