I have been using my docking station with the laptop screen and two external screens. The laptop screen has pretty good resolution but it is a small (14") real estate. I’d like a third large screen instead.
I have connected a third screen using the HDMI-4K port and whether I disable the built-in screen or not, I get no signal on the third external display.
I’m connected to my Lenovo Yoga via USB-C and passing power to the laptop as well.