I have configured private Service Access for CloudSql from my VPC. My VPC has 2 subnets in regions us-west1 and us-central1.
The issue is:
My app is NOT able to connect to the CloudSQL instance from us-west1 (subnet) but is able to connect from other region us-central1 fine.
I believe the private Service access is at VPC level so all subnets in that VPC should be able to connect the CloudSQL instance fine.