Small viewport on mobile

If you view this page on mobile, it appears like this:

https://drive.google.com/file/d/1i4U6qzO-xtiQGRuZ2JEmPtUCwQcLn4Ow/view?usp=sharing

So we’re only scrolling that certain height. I’ve tried changing the settings and all that but nothing seems to work.

The page I need help with: [log in to see the link]