This is a good way to get outside and do challenges like jogging every single street in your town. I figured that OSM was basically complete, but info was severely lacking for my area. It’s really easy to make local maps MUCH better.
I have since noticed, to my frustration, that whatever map data Uber uses has the same issue, and will send Uber drivers to this road behind my house that doesn't actually have any access. Trying to explain this to Uber and get it fixed is basically impossible.
StreetComplete makes painfully visible that OSM is missing this info in a lot of places, but I never heard of any other map even trying to provide this accessibility info
In German cities I find that it's relatively complete btw, but yeah many places (also in Germany) don't have any data at all. Maybe there should be some collaboration where people can sign up for being notified if a blind person would like to visit an area near them and they can do a survey. It's not like it takes a lot of time to answer some questions about the five crossings a given village(-sized area) will have