Unable to answer "What’s the surface here?" for https://osm.org/way/682212631 via StreetComplete 52.0:

There are 3 fields. From east: asphalt, grass and then clay (not sure how it is called).

Attached photo(s):
https://westnordost.de/p/146569.jpg
https://westnordost.de/p/146570.jpg