Sure:
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Proxmox backs up all my VMs/CTs nightly to the proxmox backup server I run as a VM with an external HDD attached to it. This keeps around 30 versions with a retention policy so I can go back pretty far if needed. These are full bootable images and include everything.
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Restic (using Backrest to manage it), runs on any VMs/CTs with critical data, and backs up to Backblaze B2 every night as well, this is a more limited choice of the critical files that I’d need. Similar retention policy as the proxmox backup.
With both I try and do some full restores every month or two and test things out.
Yes I’m waiting until it’s ready for the average user before I recommend it to anyone.