Unable to answer "Who is allowed to use this playground?" for https://osm.org/relation/2115926 via StreetComplete 53.3:

Parece abandonado.

Attached photo(s):
https://westnordost.de/p/169124.jpg
https://westnordost.de/p/169125.jpg
https://westnordost.de/p/169126.jpg
https://westnordost.de/p/169127.jpg
https://westnordost.de/p/169128.jpg