cPanel on GCP - External/Internal IP mapping

[nightninja]

Id like to at any point, provide an external IP to a single VM (single zone) running WHM for the use of a "dedicated ip" that is assignable to a domain within WHM.

Id also like to have a single external IP address always assigned to the VM for use as a "shared" IP within WHM.
This is easy enough to make the IP allocations in WHM. However - Whats the best way to approach this? What is the routing and mapping functionality that I need to implement specifically within GCP?

I've explored the use of cloud NAT, however this would seem to only be effective for outbound traffic.

Thanks

 

[cPanelLauren]

This is the only configuration we support: 1:1 NAT | cPanel & WHM Documentation

You can have multiple internal IP's that route to the same number of external IP's which would allow you to assign dedicated/shared IP's but all separate internal IP's must resolve to a separate external IP