Can you upload a diagram of how your scenario looks?
NAT is needed to have a public IP for Veeam portal for external users access
If what you need is the client request to end at Edge and make the Edge send the request to VCD, Veeam, etc on your mgmt network check on your Edge rules configuration to terminate connections on Edge rather than sending client request directly to your servers.
Thanks for the response.
The original author of vcd plugin cleared my doubts.
By default, we need to expose the vcd self service 9443 port to internet. This is the default behavior