How can I do that without keyboard?
./policy/qubes.InputKeyboard has
sys-usb dom0 allow,user=root.
I haven’t checked qubes.InputMouse, but Keyboard is the essential part anyway.
I followed Locked myself out after creating Sys-USB - #14 by lenis_machines but stopped after 10 because there was nothing to change.
I wasn’t sure about the user=root part, but I left it.