Hi everyone! I’m reviving this topic as I have the same problem.
I’m using Cloudflare, my domain is registered in Namecheap, with Cloudflare nameservers.
I’ve been trying to do this for a few days, but I can’t make it work.
At first I was using the proxied DNS registries for CNAME, A & AAAA.
I did it with test.rdiazlugo.dev and it worked, but when doing it with *.rdiazlugo.dev and the root domain, it doesn’t works.
Any help would appreciated, thanks in advance.