Does .miami exist?
Yes. .miami is a real top-level domain, live in the IANA root zone right now.
See the .miami page for what kind of TLD it is. Note that existing in the root doesn’t always mean anyone can register one — some TLDs are brand-restricted.
Try to register a .miami domain
This answer is generated from the live IANA root zone list, not from vibes. If the DNS changes, this page changes.