We found that "mapping events" as we call it are a very suitable group activity with social distancing. The virtual event connects the people who go out separately to map the accessibility of places.
wheelchair-routing is a difficult, unsolved problem IMHO. Yes you can use a profile in Graphhopper and the Heidelberg University did a large project as well.
When talking with wheelchair users I learnt that they often improvise on the routes they take, for example crossing the road even without curb-cut because it is quicker for them or trash bins blocking the sidewalk.
We plan to integrate a base layer design like https://www.accessmap.io/ which can help with basic orientation (eg. red-colored streets if they have a steep incline for example).
At the same time it would be great to have very detailed data about sidewalks in general. Apart from OSM I think this is an interesting definition: https://sharedstreets.io/
Thanks for adding places! Yes, we plan to change the wording regarding toilets a little bit. When people add new places, we ask some more specific questions already. We also have > 100.000 photos of places, which are mostly entrances and toilets.
Some sources are open-licensed (which we provide right away when you use our API), and some only agreed to share with Wheelmap (for example Foursquare, HERE Maps, and others). We would love to see the license-compatible places in OSM as well but agree that a mass import is not the right way.
Thanks. Wheelmap is really minimalisitic in the number of questions, and we often get asked to extend it. It's only after we worked with all the other sources which had more detail that we start to show these. It's more difficult to map but when users add a new place we ask more questions today.
Co-founder of Wheelmap here. Great to see it mentioned! Wheelmap is 10 years old this year and has 1 Million places from OSM (and synced back) and 1.3 million places from ca 130 other sources which we aggregated as one API for others to use as well. You can find more info on https://www.accessibility.cloud/.