How to create hyperlinks on iOS app?

This is an issue. I keep looking around and haven't found it.

I do all my work on my iPad pro.  I have the intention of creating images which I then infuse into a PDF, which I then intend to hyperlink into various places.  In the Acrobat app on my desktop this is easily done.  However, how can this be done in iOS?

As in, how do I create a PDF in iOS, then edit it, add * new * hyperlinks to it in the form of boxes or whatever, and then have that saved to the PDF file, all within the iPad environment?

thanks!