If you or anyone else is still looking for a programmable or controllable USB KVM, though this also comes with a HDMI 2.0 4K 60hz switcher and is accordingly mo

If you or anyone else is still looking for a programmable or controllable USB KVM, though this also comes with a HDMI 2.0 4K 60hz switcher and is accordingly more expensive, https://www.aliexpress.com/item/1005005149590635.html https://www.aliexpress.com/item/1005005149590635.html is probably what you need. It has a USB port linked to a USB serial internally that you send strings to switch. It was designed to be used with the Pi KVM/BLIKVM KVM over IP solution but works for other things as well.