This isn’t a completely considered answer so apologies if it’s on the wrong track, but perhaps try and changing your content items to position relative. I notice they are all static and there was something in your form that had a z index of 50?
Thanks @Alcon I think it definitely has something to do with that! When inspecting the published site, I just realized the reason why nothing shows up is because everything has an absolute position of Left: 0% and Top: 0%
That should be relative to ‘Slider Content Wrap’ which it is when you preview it in the designer. However, it looks like when published it loses that relation and is just absolutely positioned to the body itself.