iOS 13.3.1, Safari: Can’t scroll past first page of PDF

I get PDF is a complex format; but I’m not trying to create a form or anything. I just want to see the entire document in the browser, like on a PC using Chrome—or on my iPhone (I have no problem opening the PDF, scrolling through the document, or opening hyperlinks in that PDF using Safari on my iPhone.) I have a hard time believing the first page is visible, but page two is just too complex.

Yes, the two issues are probably related. As I’ve I futzed around, I’ve “accidentally” resolved the issues—without knowing how, so I cannot replicate the “fix”.

So, this is the latest: Trying to resolve the other problem re. hyperlinks, I touch and hold a hyperlink, options appear (of which “Copy” is one), I select “Copy” (not knowing what I’m copying—the URL, the text, etc.), I open a new, select “Paste and Go” (in the address bar), and the ENTIRE document opens. My attempt to fix one problem uncovered a workaround for the other problem.

Silly.

The first recommendation didn't work. The rest of the recommendations sound highly unnecessary. Why can't the effing thing just work the way it's supposed to? I might as well throw the iPad in the trash and get a Windows laptop.