Unable to answer "What surface does this square have?" – Rue Bombecul (Pedestrian Area) – https://osm.org/way/714069124 via StreetComplete 57.3:

Revêtement change en cours de route. Entre les maisons : asphalte. Ensuite pavés non taillés.

Attached photo(s):
https://westnordost.de/p/214993.jpg