Get you completely. Just a note that the scrolling in that example was very controlled, and slow, not a realistic use case. When last have you scrolled back up on a website slowly? I unfortunately haven’t been able to find any actual divers website on the internet. It’s possible that it isn’t actual Wix functionality, e.g. photoshop mockup or on internal project.
I mocked up something without the delayed scrolling effect, a very rudimentary version of what I mentioned earlier here - https://derrellchristopher.wixsite.com/mysite