3D FlipBook - flipbook popup not responsive in iOS

Hi Team,

I am trying to use the plugin and the iframe is not responsive in iOS but works in Android Chrome. Please help

The page I need help with: https://blackandwhiteoman.com/3d-flip-book/bw-april-may-2019-edition/

Let me know if there is any setting, I have missed out.

https://blackandwhiteoman.com/black-white-june-july-2019-edition/

https://pasteboard.co/IthXTNT.jpg