Next release of #GrapheneOS will enable the new Desktop Mode on all devices rather than just the Pixel Tablet.
Discussion
This will open up a multitude of possibilities. Will it be a virtual machine?
This is the desktop mode for GrapheneOS itself, so no. You will be able to run the virtual machines from the desktop mode though including running virtualized Desktop apps in their own windows:
It's an upstream developer feature that needs to be refined so this will be a developer option too.