I recently received my pro1x which is still running factory android OS.
I purchased a USB-C to HDMI adapter (https://www.amazon.co.uk/Discount-Compatible-MacBook-Surface-Galaxy/dp/B07CL2RHX5). When I plug it into a monitor or TV nothing happens. When I try from the USB preferences menu to swap control to the phone is says it "couldn't switch".
Is this something other people are encountering?