Notes App not scanning as pdf

I have just scanned a few documents using the Notes App but I have experienced 2 issues that I haven't been able to find an answer to.

In the Notes App I have created a new Note, selected the camera, selected scan document and on all occasions the files have been saved as .jpegs instead of .pdfs. I want any scanned documents to be saved as a pdf - otherwise I would just take a photo if I wanted files saved as .jpeg.

The other issue I'm finding confusing is how to save multiple pages as one .pdf. When I used the above procedure for a 2-page document and allowed the 2nd page to be scanned automatically, I expected it to be saved as a single 2-page .pdf file but it didn't - it saved as 2x separate .jpeg files.

So, if someone could please tell me how to save scanned documents as .pdf by default and how to save multiple page documents as a single .pdf, I would appreciate it.

Thank you