You can install Home Assistant (HA) as LXC or VM on Proxmox. Or even put HA as docker container on top of a LXC or VM, but passing through hardware (like ConBee II) will become much more complicated. There a many installation guides i.e.
and there are few scripts which automate the installing process. Unfortunately some of them doesn’t work anymore for PVE 7 i.e.
The only script that is working (while writing this) is this one https://github.com/tteck/proxmox_haos_vm which is possibly a fork from the previous script from whiskerz007.