No, I am not talking about physical connectors, not about real PS/2 ports on laptop case. But about how it is connected inside. Thinkpad T16 Gen 1 has both keyboard and trackpoint connected in the way that if sys-usb hangs, keyboard still works flawlessly. Because those are not connected internally via USB at all (unlike touchpad) but in some different way, probably PS/2. Maybe your Framework has the same.
Please answer this comment of mine to understand the situation: Framework Laptop 13th Gen, Intel i5-1340P - #12 by balko