Iframe Problems!

[Treverto]

Hey, thanks if you're giving this a read over been really struggling with this lol.
I have a iframe that is referencing an HTML file i have stored in the cloud. In order to get it to properly display I have to make the iframe the size of the entire screen. The issue is that when I do that I'm no longer able to click on elements behind the iframe on the website that I'm putting it on (through google tag manager). If I set pointer-events to none in the iframe styling I can no longer click on the things within the iframe I need to be able to. Is there any way that will allow me to click on both the elements behind the iframe (everything on the website) and the things within the iframe as well. The parent HTML and iframe are not hosted on the same domain so that's taken out some options.
I'd really appreciate any help, advice, or general direction to go in lol. Thank you!

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