What's the usecase which can't be solved by using a 3d Party backup tool like restic, Duplikate, borg or whatever you prefer?
PBS is mainly for PVE vms and lxcs, for restore you need a working PBS.
While with restic or similiar Tools you just need the backup tool Binary which xan be saved on the same storage as the actual backup ( samba or nfs share, sftp access, s3 storage etc).
For this reason although my notebook runs Debian ( thus proxmox-backip-client is available) I would never use PBS as backup for it. And I would never use restic to fo backups of my vms.
Use the right Tool for the right job.
PBS is mainly for PVE vms and lxcs, for restore you need a working PBS.
While with restic or similiar Tools you just need the backup tool Binary which xan be saved on the same storage as the actual backup ( samba or nfs share, sftp access, s3 storage etc).
For this reason although my notebook runs Debian ( thus proxmox-backip-client is available) I would never use PBS as backup for it. And I would never use restic to fo backups of my vms.
Use the right Tool for the right job.