Hi Allen,
I am using Cloudberry Backup VM Edition and We don't need to install Cloudberry on each VM, I run Cloudberry from a VM, my backup server and Cloudberry Backup VM Edition can connect to your hosts and backup the VMs you can choose to backup all VMs on the hosts or individual VMs same for restore.

For more information, you can check this link.
https://youtu.be/Endn4NxrKtY

Best Regards,
Tom