Unable to answer "How are the footway and cycleway laid out here?" for osm.org/way/28175304 via StreetComplete 32.2:

Schild weist ihn in beide Richtungen als reinen Radweg aus

Attached photo(s):
https://westnordost.de/p/47408.jpg

Unable to answer "Is this playground publicly accessible?" for osm.org/way/465653860 via StreetComplete 32.2:

existiert nicht mehr

Unable to answer "Is it restricted who may park here?" for osm.org/way/433242894 via StreetComplete 32.1:

nördlicher Parkstreifen ist öffentlich, südliche zwei sind private

check boundary relation here, where is the Killarney National Park

Spielgruppe laut Webseite an anderer Adresse: Altlandenbergstrasse 4 - Umgezogen?

What kind of device is generating power at this place?

Someone with local knowledge should check the mapping of Hagaparken.
Two different ways cover different areas and one of them looks strange and full of self-intersections. Some separate tacked wooden areas also named Hagaparken.

Ueber Bing eingetragen, Merkmale/Befahrbarkeit fehlen noch

Check this polygone, I did not understand where it belong to.

double line, double natural tag