Unable to answer "Is it restricted who may park here?" for https://osm.org/way/736725672 via StreetComplete 25.1:

there are three different parking areas, one private (company Oracle), one unclear and one part of Park U.

Attached photo(s):
https://westnordost.de/p/21635.jpg
https://westnordost.de/p/21636.jpg
https://westnordost.de/p/21637.jpg