ASUS Touch Monitor and Mac OS 10.13
MacOS native HID driver does not support touch screens.  Some touch devices switch to single touch 'mouse' emulation when plugged into a non Windows system, many don't and stay in Windows HID multi-touch mode not supported by MacOS.  We supply a MacOS multi-touch driver that mimics a Apple track pad and much more.  Further details are available at www.touch-base.com
You might also check a product USB Overdrive, they don’t explicitly mention touch screens, but they have long provided quality software for Mac and input devices and are fully ready for Catalina. Further detauils on that are at https://www.usboverdrive.com/