P: embedded PDF in album (or Express)

I want to include PDF files in an online album. It appears that the only files allowed in a lightroom album are photos and videos. My rationale: Say I'm presenting my child's time in college. There are photos of course, and some short videos, but I also want to include a nice 5-page letter that a professor wrote acknowledging my child's contribution to a project. It would be really nice if someone viewing this album could scroll through that letter in an embedded PDF reader and also be able to download the PDF and read it locally if desired. An alternative I tried is Adobe Express -- it seems to have ways to convert a PDF to a group of images, but that's not really what I want. You would think Adobe (the inventor of PDFs!) would have support for this kind of thing. Is there a way to do this? If not, how can I request such a feature?