How to get support when Route 53 DNS not resolving

Hello.

Can you check NS records with "whois"?
After checking, check if the NS record matches what is registered in the Route53 hosted zone.
If they do not match, please modify the NS record registered in Route53.

whois domain.com

If you have a problem with Route53 domain registration, I think you can contact AWS Support by opening a case under "Account and Billing".
Inquiries via "Account and Billing" can be made free of charge.
https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/domain-contact-support.html

NS servers match, thank you for the link to Account support.