On postmarketOS edge, Sxmo 1.15.1, touch input does not work properly for me. Although the device responds to touches, they do not correspond with what is displayed (e.g. open the virtual keyboard, click outside the keyboard and a character is typed).

After setting export SXMO_TOUCHSCREEN_ID="7" (according to cyttsp5 of xinput list) in the device profile, touch works properly (although, after coming back from suspend, it does not work).