Unable to answer "What’s the surface here?" – Boulodrome Elan de Lyon - Verlet Hanus (Boules/Bocce Court) – https://osm.org/way/680923573 via StreetComplete 62.2:

Le boulodrome semble fermé et n'est plus entretenu

Attached photo(s):
https://streetcomplete.app/p/325782.jpg