Hi @aldomoro,
withqemu-server >= 9.1.5 you can enroll the KEK too (it's currently on the pve-test repository). The documentation is not live yet, but see: https://lore.proxmox.com/pve-devel/20260223152556.197761-7-f.ebner@proxmox.com/
Backports...
I found a solution for the other nodes to recognize the LVM of the LUN without having to restart the node.
The node that does not recognize this lvm must be able to recognize the disk, lsblk. In my case is sdc
NAME...