The touchscreen (both finger and pen support) on my Pixelbook has been broken for a while (the Wacom digitizer was always present on i2c but it wasn’t sending events). There was like one time where I managed to get it to work briefly by holding the pen against it in some way, but that was it. Today I took the laptop out of the bag by the middle part, squeezing the lid a bit. Aaaand… touch works now! Something was going on with wiring somehow inside the lid (not the hinge) I guess? :/