Getting "getaddrinfo ENOTFOUND 500" error while invoking GCP apigw-2.com/api2 from GCP cloud run micro-1.com/api1

Question

At present we have the below integration flow

angular app -> GCP apigw-1.com/api1 -> GCP cloud run micro-1.com/api1 -> GCP cloud run apigw-2.com/api2

we can invoke below without issues

1. angular app -> GCP apigw-1.com/api1 -> GCP cloud run micro-1.com/api1
2. directly GCP cloud run apigw-2.com/api2 from postman

however, when GCP cloud run micro-1.com/api1 -> GCP cloud run apigw-2.com/api2 is invoked we get apigw-2.com getaddrinfo ENOTFOUND 500 internal server error

Please let me know if there is any special config is required at GCP side to allow micro-1.com/api1 to invoke apigw-2.com/api2?