Security aside, both Gnome and KDE may be too resource hungry for small VM like Whonix. Therefore, it makes me think, did you see that Raspberry OS has just moved to Wayland with LXDE.
“What’s replaced LXDE?”
LXDE is an assembly of various components, the main ones being the openbox window manager, the lxpanel panel and the pcmanfm file manager and desktop. Openbox has been replaced with wayfire; lxpanel has been replaced with wf-panel-pi, and pcmanfm is still used, but modified to work with a Wayland backend. Bookworm — the new version of Raspberry Pi OS - Raspberry Pi