Within our .net 6 projects when we have upgraded auth0 from 1.0.1 to 1.0.2 the User.Identity.Name is now null and we can see these differences in the claims;
The best way to handle that would be to raise a GitHub issue in appropriate repo of ours so we can work on that directly with the repo maintainers. Once you have a link to it you can share it here so we can ping them. Thank you!