Probably some vendor provides the trackpad, and provides a driver for that trackpad, and it recognizes the gesture and then sends Windows a `GestureHappened()`

Probably some vendor provides the trackpad, and provides a driver for that trackpad, and it recognizes the gesture and then sends Windows a `GestureHappened()` event. Versus macOS being fully integrated and effectively generating `GestureProgress(0.31)` events.