I am on a Lenovo IdeaPad, and the touchscreen drawing does not work even in touchscreen mode. Rarely will it show what I drew and even then, it is after I have lifted my finger. I can only really place dots. Also, pinch-to-zoom doesn't work. Seems to be related to this forum post: https://community.adobe.com/t5/illustrator-discussions/unable-to-draw-with-a-pen-on-touch-screen-on-windows/m-p/11376148