Lots of Dell monitors support this - probably every single currently-in-production Ultrasharp supports it, and I think some of the lower tier non-Ultrasharps may support it as well.
Dell monitors all support DDC, I'm not sure if KVM switching can be controlled over DDC but it's likely.
Somewhat unrelated, but some of the Dell monitors also have USB-C support, where a single USB-C cable connects to your laptop and: charges it (Power Delivery from the monitor), hooks up the display (DP alt mode), and connects to the USB hub on the monitor. So if you use a wireless kb/mouse with receivers plugged into the monitor, you'll have literally just 2 cables on your desk - a power cable for your monitor, and a USB-C cable between the monitor and laptop.
Dell monitors all support DDC, I'm not sure if KVM switching can be controlled over DDC but it's likely.
Somewhat unrelated, but some of the Dell monitors also have USB-C support, where a single USB-C cable connects to your laptop and: charges it (Power Delivery from the monitor), hooks up the display (DP alt mode), and connects to the USB hub on the monitor. So if you use a wireless kb/mouse with receivers plugged into the monitor, you'll have literally just 2 cables on your desk - a power cable for your monitor, and a USB-C cable between the monitor and laptop.