Unable to answer "Who is allowed to park a bicycle here? Parking may be free or paid." – Bicycle Lockers – https://osm.org/node/12106749427 via StreetComplete 62.2:

This is a bike rack. There is only one locker here (which is already on the map a few feet south and shown in the photo).

Attached photo(s):
https://streetcomplete.app/p/325171.jpg