To my understanding the touchworkarounds works to pass any screen touch to the videoplayer to begin playing on iOS.
The ad I'm developing opens a pano in an iFrame when the user touches the screen, but this touch doesn't pass to the pano's iFrame to trigger the touchworkaround.
Not being able to see the source code of touchworkaround makes it very difficult to develop a workaround for the iFrame receiving this touch event.
I think the best way would be to eith pass the touch to the iFrame element itself or to pass and receive the event through the JS postMessage/addEventListener('message') methods.
Thanks!