LongPressGestureHandler on mobile (ios/android) is implemented as a continuous gesture, i.e. we can drag it around after long-press activated. However, on the web, it is implemented as a PressGestureHandler, which is a DiscreteGestureHandler. Judging from onRawEvent: it seems to only fire INPUT_END event when the gesture is released, i.e. it ignores all gesture movements.

Not sure if this behavior discrepancy is intended, figure I should ask before attempting the fix.