It appears Google implemented the records type65, but not type64. Also Youtube. I am curious what browsers are leveraging this currently. I can't find many other domains using it yet. It seems Apple use it on some subdomains [1]
I see some hits in my name server stats for https/svcb types so I guess bots are looking for it. Perhaps scanning how widely adopted? The list of types has grown since I last looked. [2] People have been busy.
[1] - https://serverfault.com/questions/1075522/whats-the-use-case...
[2] - https://en.wikipedia.org/wiki/List_of_DNS_record_types