Whilst you'll be missing features like shadow copy and I'm not sure if permissions will be preserved it looks like the Proxmox backup client can run in a WSL2 environment and furthermore it appears at least that providing the Linux user can read them it can backup files from the windows side as a side effect of the windows drives being shared to the WSL container via /mnt/<drive letter>
Wouldn't trust it for anything mission critical but might be handy if you want an extra backup of your workstation
Wouldn't trust it for anything mission critical but might be handy if you want an extra backup of your workstation