"Domain not registered to account"

Is the DNS zone in Route53? If so, did you modify the DNS config in Porkbun to point to the Route53 name servers?

I posted a blog about setting up DNS for ACM that might help - its mainly about automating the configuration but there might be something useful - https://headforthe.cloud/article/managing-acm-with-terraform/

I'm also getting this. Everything seems configured correctly. I'm disappointed the error message 'Domain not registered to account' is nowhere to be found in the documentation.