Sorry, you can't have a CNAME on the root domain - Porkbun refuses CNAME for Zeabur apex domain
You cannot put a CNAME on an apex/root domain, that is an actual RFC restriction, not a Porkbun quirk. Porkbun's ALIAS record is the equivalent for apex domains, but you need to make sure it actually resolves to the right target. The maintainer suggested flattening the CNAME yourself: run dig against Zeabur's CNAME ta…
Problem outcome: unknown