I’m having this issue too. I tried these steps but with no success at all. https://techtablets.com/forum/topic/x4-touch-screen-not-working-after-fresh-install-of-win10/ maybe if you was able to fix please share with me.
Can you please do a tutorial? I’m getting this problem with a teclast x4, found the driver but not the touchsetting.gt and I don’t actually know how to install the driver from these files in the follow link https://drive.google.com/file/d/1LvQFfTDCNJeLqrKGRMhz3G5m28kJuyy5/view