Try the iOS Mac profile, CLI and http://doh3.dns.nextdns.io/ but nothing works, It’s DoH3 disabled or something?
I don't have the answer, but suspect something was wrong with DOH3 since it was rolled back in the CLI a while ago. Hoping for some news soon from NextDNS team
Looks like theyve had some DOH3 issues, so rather than fix it and move on, they are (have?) removing in........hmm
DoH3 Chrome Version: 91.0.4472.77 Windows 10 Version 21H1