I self-host a DoH/DoT server and my local DHCP advertises it to local clients. It’s kinda cool because android phones on my wifi will use DoT when private DNS is set to “automatic”.

Private DNS sort-of broke while I was tinkering with internal/external IP addresses for nearby devices. It wouldn’t always connect when I specified my external IP (despite being available externally). I made it IPv6-only too. It wouldn’t be the first time something couldn’t handle it.