Unable to answer "Are the opening hours here signed?" – Fast Food – https://osm.org/way/165966908 via StreetComplete_ee 57.0:

there is no shop here

Unable to answer "Is there a summit cross here?" for https://osm.org/node/4279928206 via StreetComplete_ee 53.32:

Kein Gipfelkreuz nur ein Flaggenmast

Die Treppe geht bis hier (laut GPS)

via StreetComplete_ee 53.32

Unable to answer "Are there curbs where this way meets this road here? What kind?" for https://osm.org/node/1934065775 via StreetComplete 50.2:

Auf Seite der Parkfläche ist es abgeflacht auf der Anderen bleibt es ca 10cm hoch

not a hospital, should be museum

via StreetComplete 45.2

"Redundancy"
The place has gone or never existed. A user of Organic Maps application has reported that the POI was visible on the map (see snapshot date below), but was not found on the ground.
OSM snapshot date: 2022-08-16T07:51:20Z
POI has no name
POI types: amenity-parking
#organicmaps

"According to a note on the official site one is supposed to use this site when there is no space left on the official one"
OSM snapshot date: 2022-06-13T12:43:18Z
POI name: Additional parking space for La Hougue Bie
POI types: amenity-parking
#organicmaps

"This place appears to have closed down. The Lidl sign is missing and the shutters are closed"
OSM snapshot date: 2022-06-13T12:43:18Z
POI name: Lidl
POI types: building shop-supermarket
#organicmaps