This is more of a Community site for Veeam, not really for varous hypervisors. Maybe someone has some experience with RHV and can assist. But, have you looked at RHV documentation or user forums?
Are you trying to add RHV to Veeam, or something else? Your post isn’t quite clear of what you’re doing. I assumed initially you’re just trying to install/configure RHV. Please share what specifically you’re attempting to do.
Here’s RedHat’s docs on installing a Cluster on RHV:
I want to add the RHV hypervisor to Veeam, it's a question about Veeam, I searched and didn't find anything, that's why I'm asking if anyone has already experienced it.