Thank you for contacting Plugable support! Sorry to hear about this issue. I’d be more than happy to assist you.
Looking at the specifications for your system it says it has:
-“1x Thunderbolt™ 3 supports display”
-“1x USB 3.2 Gen 2 Type-C”
I assume you’re connecting through the Thunderbolt 3 port, but if not please do so.
For the second display not working, what port is it attached to on the dock? There’s the “Display 1” for HDMI and DP, and “Display 2” HDMI and DP.
If you swap the monitors around, does the non-functional monitor stay with the same port on the dock, or does it follow the same monitor over to the other port?
For charging, ASUS does not call out USB-C charging as being supported from either C or Thunderbolt 3 ports in their specifications. Looking at their specs closely your system power adapter is 150W, so the computer likely needs more power than is able to be provided over USB-C and thus is not supported.
Once I know more about where the non-functional monitor is connected on the dock and if swapping ports helps or not we can proceed from there.
It may also be helpful to get some diagnostics for the system.
We have a troubleshooting tool that helps us find out what is going on in situations like this. Please plug the dock with your monitors attached to it into your computer, then go to this page and follow the instructions there:
When emailing us the diagnostics results please mention ticket “371793” in the subject line, don’t attach the results here!
Edit: I see you contacted us directly already with the PlugDebug. I will take a look and update with anything I see that stands out.
Thanks again for contacting Plugable support and best wishes,
Senior Engineer | Product Owner