Unable to answer "What’s the surface here?" – Commercial Road (Sidewalk) – https://osm.org/way/1241974791 via StreetComplete 57.4:

The pavement has paving slabs. The map suggests there are two roads in parallel both called Commercial road but there aren't.

Attached photo(s):
https://westnordost.de/p/215806.jpg
https://westnordost.de/p/215807.jpg