Is it possible to edit or delete the Subdomain name after creating one? I have not yet set the resolver.
You cannot “edit” a subdomain’s name. If the name is different, then it’s a different subdomain, that you have to create.
You can “delete” a subdomain by transfering ownership to
address(0). For completeness, people that have set the resolver might also want to reset it back to
address(0) before doing that.