Generic 4x1 KVM that looks like this. Many names.

https://www.amazon.com/gp/product/B08R7HR591/

CKLau 2x1 KVM

https://www.amazon.com/CKLau-Switch-Cables-Manual-Switcher/dp/B0B5WLZMFM/

And a discontinued Monoprice Blackbird 4x1 displayport KVM that I can't find.