Unable to answer "Who is allowed to park here? Parking may be free or paid." – Parking Lot – https://osm.org/way/114954888 via StreetComplete 57.2:

隣の駐車場と同じ駐車場だと思う。

Attached photo(s):
https://westnordost.de/p/216902.jpg
https://westnordost.de/p/216903.jpg
https://westnordost.de/p/216904.jpg
https://westnordost.de/p/216905.jpg