Unable to answer "What kind of artwork is this?" for osm.org/node/6755980085 via StreetComplete_ee 55.0:

I believe this is wrongly tagged ;)

This warehouse was extended

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Unable to answer "What kind of service building is this?" for osm.org/way/1120556375 via StreetComplete_ee 53.31:

This is industrial elevator for moving supplies to -1 floor

Unable to answer "What are the opening hours here?" for osm.org/way/181023773 via StreetComplete_ee 53.31:

You can come in just by prior meeting agreement

Unable to answer "What kind of building is this?" for osm.org/way/402088626 via StreetComplete_ee 53.31:

The building has been demolished

These two buildings are actually one building

via StreetComplete_ee 53.31

These steps are mapped as 3 separate ways instead of one (just upper set of steps)

Top set: 8 steps
Bottom set: 5 steps

via StreetComplete_ee 53.31

Attached photo(s):
https://westnordost.de/p/182892.jpg

Stairs

via StreetComplete_ee 53.31

Underground garage

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There are steps on every footpath leading to the building

via StreetComplete_ee 53.31

Attached photo(s):
https://westnordost.de/p/175918.jpg