Hi @IN ,
In Azure, you can deploy Workspace in VNET Injection mode and attach NAT Gateway to your VNET.
NAT GW require Public IP. This IP will be your static egress IP for all Cluster in for this Workspace.
I've never worked with GCP, but I think you can do similar thing. So you can configure a customer-managed VPC, and then configure egress to use Google Cloud NAT. And that NAT you can configure with static IP address.