Problems in mobile viewports

I built my 2nd website with WF but am having some problems with it on tablet sized viewports. I am not overly concerned with viewing the site on a phone in either landscape or portrait view. The public link for viewing is https://webflow.com/design/buckeyeriss?preview=e5288f17d1f755f404927d63cb2509fd. My issues are as follows:

  1. The slide-down navigation that appears on scroll on the desktop is supposed to also appear on tablet sized devices in landscape view but doesn’t.
  2. The navigation should also appear on scroll in portrait view and appears to “want to work” but the background is black and the links are in two rows.
  3. There is a picture of my daughter on the beach where she is leaping in the air. It appears correctly (landscape) on the desktop but on my iPad the picture is in portrait mode.

Can someone please help me figure out why these things are happening and how to fix them? Thanks.