As someone doing the same but for biking on https://wandrer.earth/ https://wandrer.earth/ It supports downloading a "map" of everything I haven't done, and the

As someone doing the same but for biking on https://wandrer.earth/ https://wandrer.earth/ It supports downloading a "map" of everything I haven't done, and then on my Garmin unit I can use that as an overlay on the map. Thus when I'm out and around I can try all sideroads showing as un-biked. Then I often find streets that OSM think are bikeable, but really are not. Either behind gates, a highway etc. And fixing this makes it better for everyone.