I don’t know if this feature exists yet.
To make a touchscreen preview, tablet compatible ( I don’t have an external touchscreen for Windows 10 or a Surface Pro) I have to publish the presentation on web, then pick my iPad, then test the final result.
I’d like to have a direct connection between the Composer and the tablet.
If you say that is possible to do with Android tablets I will buy one.
I understand iOS restrictions but I would like to have an immediate feedback and don’t waste my time publishing every modification.