Unable to answer "How many steps are here?" – Steps – way/840854932 via StreetComplete 61.3:

Stone "stairs"

access=yes
amenity=drinking_water

Hotel seems to be closed permanently

via StreetComplete 61.3

bicycles are allowed in both directions
(it's part of the PC22 & PC7)

bicycles are allowed in both directions in this oneway (from the Millewee bridge to Schullwee)

Asphalt, access only for bicycle and pedestrians

Die Straße wird bei OSM als "Avenue du 10 septembre" geführt.

Offiziell lautet der Straßenname aber "Avenue du dix septembre".

Siehe: https://map.geoportail.lu/addresses/Luxembourg/Avenue%20du%20Dix%20Septembre/

Eine Geocodierung von "...dix septembre" läuft bei OSM aktuell ins Leere.

Unable to answer "What’s the surface here?" – on bridge: Foot Path – way/835570772 via StreetComplete 61.1:

Bridge not there anymore

Attached photo(s):
https://streetcomplete.app/p/295577.jpg

Privat parking, no public access

Does this tunnel exist?