In a week or so, QMK will pick up a whole bunch of new support for pointing devices -- Djinn's open-source, so if you're keen you can swap a display out for a Cirque touchpad for instance.

Maybe this, but I haven't looked at it beyond the title: https://www.reddit.com/r/MechanicalKeyboards/comments/qrm3i1...

I would love something like that, either touch trackpad or some trackball with easy way to left click and right click. No more switching between "two different input devices".