When you create a private gateway #API, you can contact it through the #DNS name, but it is resolves only in your #VPC with a VPC Endpoint with Private DNS enabled. #AWS
http://bit.ly/32p3wtO
http://bit.ly/32p3wtO
ExploitNetworking
Connecting to a Private API Gateway over VPN (On-premise)
When you create a private gateway API, you can contact it through the DNS name, but it is resolves only in your VPC with a VPC Endpoint with Private DNS enabled.