Hi All,
I have been struggling to resolve this problem for long time as well!!
But I am able to fix it by following a method that I saw online. I unplug everything from my laptop and leave it alone. Then long press the power button for 40 seconds, have to be exactly 40 seconds! Then turn on the laptop and connect all cable, HDMI/USBC wire.
It works well now! I am about to connect two monitors at the same time !
This worked for me, too, as unlikely as it was. I have a Lenovo Thinkpad T14, for reference.
Thank you.