Unable to answer "What’s the structure of this bridge?" – Bridge Area – https://osm.org/way/1096501568 via StreetComplete 63.0:

Keine Brücke sondern überdachte Verbindung zwischen Häusern (zweistöckig)

No bridge, but a covered passageway between buildings (two stories)

Attached photo(s):
https://streetcomplete.app/p/330632.jpg