Had some news about this, it seems this issue will be solved in Zerto 4.5U4.
Hello, We’re currently in a POC of the Zerto solution to build our DR environment in AWS. We’re facing a problem with VMs that have more than 12 vdisks attached, we cannot add them in a VPG. The documentation found for Zerto/AWS (ZVR-ETPA-4.5U2-01-30-05-16) is not clear about the limits in such VMs, in section “TEST1: […]