Just had a thought...the OnePlus 6/6T have a physical switch used for silent/vibrate/ring in Android that is unused on mobile Linux.  I want to use it to select between mouse, touchscreen, and onscreen keyboard modes.  My TouchPad Emulator program allows using the touchscreen as a mouse but I use the volume keys to switch modes.  Using this physical switch would be more convenient and now I want to test it.  Anyone know if this switch is readable in postmarketOS?