What are the supported Proxmox versions for backup?

What are the supported Proxmox versions for backup?

BDRShield supports agentless Proxmox Backup for the following versions:
  1. Proxmox VE 8.2
  2. Proxmox VE 8.1
  3. Proxmox VE 8.0
  4. Proxmox VE 7.4