If really yes, and although a bit awkward I would suggest to use "X11 Driver" here too, similarly to how win32u does the same for options that are now usable on a wider choice of backends. The idea is at some point to change the name to something generic but I'm not sure how to do that properly.
It's too confusing for users. I think either open a new MR to add a generic key (leave "X11 Driver" key for backward compatibility) and then merge this MR after that one, or just add "Wayland Driver" key in this MR and add generic key in future (leave both "X11 Driver" and "Wayland Driver" keys for backward compatibility). It is inconceivable for users that you will need to modify a key under "X11 Driver" to control wayland behavior.