Jarek 🚲
I downloaded StreetComplete and took a look at this area and at Chambly and I think that's just how it renders sidewalks: same as streets but thinner. Then when sidewalks are given a name, it displays the name too and it looks rather like a smaller road.

I also checked in OsmAnd here and in Chambly and I couldn't really see anything out of ordinary on the standard style. OsmAnd's sidewalks and cycle paths are thin dashed lines which looks a fair bit clearer than StreetComplete.

(There isn't really consensus or a clean way in OSM on how to associate separately-mapped sidewalks with the road they're for - so apps could show "walk down rue Centrale" - and in some places the sidewalks are explicitly given the name of the street.)

If you think there might be something wrong with how an app displays OSM data, an annotated screenshot would be great for debugging what might be wrong.