I’m trying to set up a subdomain test.example.com that is hosted on AWS. I have some assets hosted on DigitalOcean and some newer assets in AWS.

1. My domain DNS is setup with DigitalOcean’s 3 nameservers as NS records.
2. In DigitalOcean I created 4 NS records with test.example.com pointing to the 4 AWS Namespace servers
3. In AWS I have a hosted zone. example.com. Under that I have A record for test.example.com that points to my API Gateway.

I know my AWS configuration is correct. If I go to my hosting company and change the NS records from DigitalOcean to AWS, test.example.com works just fine. What am I doing wrong here? I thought it was DNS propagation that was taking a while but I’ve waited about 50 hours now.