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.
Text is selectable in the resulting PDF, but I’m sure that this behavior depends on how you create the PDF, though. I’m on the Mac, which has built-in PDF creation in every print dialog box… and all the text in the resulting PDF file is selectable.