To add (from https://wiki.openstreetmap.org/wiki/Key:footway#name)

"Sidewalks are usually left unnamed in OpenStreetMap, but some mappers prefer to use name=* to associate a sidewalk with a street, avoiding the complexity of a relation. Around four percent of ways with footway=sidewalk have name=* set as well (around 125,000 as of August 2022). "