Unable to answer "What’s the surface here?" – Steps – https://osm.org/way/398790761 via StreetComplete 57.3:

These steps and the path under the bridge no longer exist. Eroded by flood water.

Attached photo(s):
https://westnordost.de/p/216342.jpg
https://westnordost.de/p/216343.jpg
https://westnordost.de/p/216344.jpg
https://westnordost.de/p/216345.jpg