Unable to answer "What’s the surface here?" – Foot Path – https://osm.org/way/1199259798 via StreetComplete 63.0:

Slightly damp earth with persistent leaf litter, not sure if it should be dirt or grass. many paths here are like that, will put dirt for now but this can be reverted if incorrect.

Attached photo(s):
https://streetcomplete.app/p/331384.jpg