I have noticed that the PDFs I have created with Page Designer (by clicking the little printer icon) do not contain selectable text. It seems to be a giant image. Not how a PDF is supposed to work.
This is especially relevant when you include a URL field and want this to be clickable. Strangely enough some of my URL fields are clickable in the little preview pane in Airtable. But only some of them.
Of course when I print and save them as PDFs none of them are clickable, because it is not text.
There is an answer to a previous question that suggests using Long Text fields to avoid that problem but that does not work for me (and how should it, since my output is not text?): Some links not clickable in output PDFs from page designer - #6 by ScottWorld