It's definitely a "you" problem. It works for me over a monitor connected via a docking station. I have tries pop os a while ago but it definitely worked.
My setup is as Linux friendly/vanilla as it comes; my laptop and dock are both Thinkpad and the monitor is Dell. Nothing exotic. It didn't even work when my monitor was directly connected via USB-C or HDMI so I guess I'm out of ideas about how it is a "me" problem.
My setup is as Linux friendly/vanilla as it comes; my laptop and dock are both Thinkpad and the monitor is Dell. Nothing exotic. It didn't even work when my monitor was directly connected via USB-C or HDMI so I guess I'm out of ideas about how it is a "me" problem.