When I did that, I used veeam to create the VM backup files to disc, then called a script to compress and encrypt the files, then called a second script to copy the encrypted files to tape. It worked really well. I used the free veeam license, so backup to tape wasn’t included, but copy to tape was.

E: FinalBoy1975 seemed to have invented something that could be the solution, but they used masking tape, which I found tears easily. Now, if they’d use scotch tape, we’d be golden hahahaa