Just a heads up that the paid version of Fully Kiosk Browser has a wake-via-camera motion option built in, and with the HA integration you can also do wake via PIR or some other input, or use the motion detection of the camera as an input to HA for further automation.

Personally, I use a bit of abandoned android software (I forget the name at the moment) that lets me use a node based system to connect the proximity sensor with the screen wake based on whatever variables work, so that works for me, but my touch panel is running an older version of android so it might not work with everything.