Nutanix is popping up more and more in enterprise environments and discovery content should be developed and provided to customers as soon as possible.
Nutanix discovery is now available as part of CP2019.11! More details can be found here - https://docs.microfocus.com/itom/Universal_Discovery_Content_Pack:2019.11/Nutanix
Specifically, we need topology that is similar to other hypervisor technologies. Nutanix has it's own hypervisor and can operate as a manager of other hypervisors.
Here's a good high-level picture of Nutanix architecture from nutanixbible.com
The Acropolis layer is the starting point in my opinion.