When updating the name servers, you need to remember that the name servers should go in the registrar’s DNS settings.
In AWS, you would go to the Registered Domains and then update the name servers by clicking on the Edit Name Servers link.
This is important to allow the registrar to redirect to the appropriate name server. If for some reason, you’ve created an AWS Route 53 but then removed the NS records for some reason. You can easily add them back in as the name servers can be found under the Hosted Zone settings.