Surprise! macOS can support the latest RFC9463 encrypted DNS advertisement. Setting option 144 of the IPv6 RA with the value below and gets encrypted DNS automatically.
1 cloudflare-dns.com 1.1.1.1,1.0.0.1,2606:4700:4700::1111,2606:4700:4700::1001 alpn=h2,doq dohpath=/dns-query
