Monitors

I have the aorus fv43u and it has a built in KVM switch. From my understanding, I can connect my laptop and main PC to the monitor and have 1 set of peripherals to control both of them. Right now I have my peripherals connected to my main PC, which is connected to the monitor via display port and a usb-b cable. My laptop is connected via hdmi and usb-c to usb-c. (I had to look up someone else config cuz i couldnt figure it out to save my life). Now when I use the KVM switch, my laptop screen shows up on the monitor, but my mouse and keyboard don't work. Are my M&K supposed to be connected to the monitor? Isn't the usb-b cable from main PC to monitor supposed to deal with the M&K data?

I also want to add that I was watching a video and the person was using a different monitor but it also had a KVM switch. However, he only had one cable connected from his laptop to the monitor. He didn't say what cable but maybe I need a special cable for this all to work?