No additional host drivers for Gnome Boxes?

I have installed the Flatpak version of Gnome Boxes on a Linux host, but I am not sure whether the two drivers (spice-vdagent and spice-webDAVD) that are required for the deb version are already included in the Flatpak version. Anyone, please?

Aren’t those meant to be installed in the VM guest?

In general, flatpaks don’t use userspace code from the host. If Boxes did need them, they’d have to be bundled.