ipv6-only web sites are borderline nonexistant, because no one who needs to maintain a profit dares to cut off a revenue stream from legacy ip only users (yet).
the most exhaustive list thus far is https://sites.ip-update.net/ afaik
the most exhaustive list thus far is https://sites.ip-update.net/ afaik
Those are the ones blocking adoption for me, as an end user.