I agree with this request. I was even going to request a similar feature:
Hello! Is it possible to add a “Open in default app” button for pdfs in preview mode? it is nothing really major, but still it can make the workflow just a tiny bit more intuitive
Use case or problem
Sometimes you just want to glance at a pdf file, and for that, the new pdf features are awesome! But for highlighting and editing, you might need OCR and other stuff in which case, using a dedicated pdf editor is a better choice. It would smoothen the workflow if there was a button that you could click which quickly opens the file in the default app.
Current workaround (optional)
right now you could just go to edit mode and right-click on the link and click on “open in default app”.