⁂ is a terrible symbol to use for the #Fediverse because it can’t be used as a subdomain. You should be able to make ⁂.foo.social, just as you can mastodon.foo.social and pleroma.foo.social. People will definitely try it and it won’t work out for them; they’ll end up just seeing xn–kwg.foo.social, which is stupid.

(I think I’m safe to consider myself the authority on Unicode domain names.)