Create a Gaming HVM

[apparatus]

You can also try to update your Debian template to trixie to see if VirtualGL will work with amdgpu driver in it.
The VirtualGL didn’t work for me with nouveau driver in Debian 12, but when I updated it to trixie then it started to work.

How to create a template debian-13-xfce

Clone deban-12-xfce template to deban-13-xfce. In the terminal of deban-13-xfce template run these commands: sudo apt update && sudo apt upgrade -y && sudo apt dist-upgrade -y sudo sed -i 's|bookworm|trixie|g' /etc/apt/sources.list /etc/apt/sources.list.d/* sudo apt update && sudo apt upgrade -y && sudo apt dist-upgrade -y