We don’t verify any touch panel. But other forum user seems has successful experience with USB touch + HDMI.
And the AGX Xavier OEM Product design guide is for making custom carrier board. If you are not going to make your own custom board, then this document is not for you.
I have tried this monitor on the shop with the Xavier, and had some virtual keyboard input issues. But it was working smoothly with a Windows 10 computer, not with Jetson. Maybe the the reason is Ubuntu…