Unable to answer "What’s the surface here?" – Foot Path – https://osm.org/way/1314925041 via StreetComplete 58.2:

There is no path.

Attached photo(s):
https://westnordost.de/p/239517.jpg
https://westnordost.de/p/239518.jpg
https://westnordost.de/p/239519.jpg