Unable to answer "Is it restricted who may park here?" for https://osm.org/way/728090046 via StreetComplete 21.1:

This parking area is predominantly residents only, but it includes a few 30min spots for non-residents

Attached photo(s):
https://westnordost.de/p/15825.jpg
https://westnordost.de/p/15826.jpg
https://westnordost.de/p/15827.jpg