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Quick Fix:
xinput set-prop 'TPK USA LLC Touch Fusion 4.' 'Coordinate Transformation Matrix' 0 -1 1 1 0 0 0 0 1
Full Fix via (https://www.raspberrypi.org/forums/viewtopic.php?f=66&t=230554&p=1413454#p1413454):
install evdev and add the following to the ""evdev touchscreen catchall":
Option "SwapAxes" "true"
Option "InvertX" "true"
Option "InvertY" "false"
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