What is the reason that on the iPhone the pictures at the bottom are white and the footer is not displayed?

Question

iPhone

I have windows on my PC, and on an android phone, everything is displayed safely.
The client has an iPhone and safari, he has a white indent under the photos and no footer. I have nothing to check on, who has something on it - please tell me what is the reason and how to fix it, I have absolutely no idea what it could be, everything is ok on all browsers.
Site
And when adding to the cart, everything is ok, but on the iPhone there will be a button that is for wholesalers. To add to cart, you must first select a color.
Single Item

Customer Video