title... , i'm test on adguard home and adguard (app mobile) DoQ but no one working with ipv4 only ipv6 DoQ work
but other doq working fine in ipv4
Are you including the port in your address? :8443 at the end. I think Adguard defaults to a different one.
vmstan that is the wrong port,
The first draft of DOQ uses 784, the second (current) uses 8853, but NextDNS allows both of these.