Blake_ASUSNoted, and thanks for confirming my suspicion.
The USB C port on this model does not support display export.
and yes, it is hardware limitation.
I am having the same problem on my zen ux433, looking for information on my own, I found this device in startech.com, there are products with more outputs if it is what you are looking for, I bought one of this adapter, but it has not yet arrived.
note: I still can't post links