https://www.androidauthority.com/desktop-mode-march-pixel-drop-3646069/

https://lemmy.world/post/43840125

Your Pixel can now double up as a full Android PC with nothing more than a USB-C cable - Lemmy.World

This has been hidden in developer options for a while now, but they’re now releasing it officially

And a monitor that supports usb-c, I assume.
DisplayLink. The Dell box I use to hotdesk my office laptop by day also works as a KVM on my pixel 9a. I get power, monitor, keyboard, mouse and ethernet on one cable.
Do you mean DisplayPort?
No, that’s different. Displaylink is basically KVM over USB-C.
As far as i know, display link requires software not available on the pixel, so you must be using display port and confusing both. Display port supports all the things you said