Facebook Conversion Gateway Aws Cloudformation Template Not generating NLB URL

After using aws cloudformation template for facebook conversion gateway:

https://conversions-api-gateway-release-production.s3.us-west-2.amazonaws.com/conversions-api-gateway.eks_multiaccount_dual_nat.yaml

It completes but it doesn't provide NLB URL and so domain is missing.

On your DNS Provider, create a CNAME record to associate <mydomain> with <pending>

instead of <pending> it should return some aws domain.