Creating image with multiple disk


I’m trying to create an Incus image for a virtual appliance. The appliance has 2 disks. To get a working version of the box on Incus, I added a custom volume and added it to the VM.

Unfortunately, with this setup, the VM and the custom volume are 2 different entities. I can’t find how to snapshot both disk together nor publish them as a single image.

Is there another way to configure things that would allow me to create a multi disk image ?