Microsoft Lens is one of the four I tried. It's the only one I kept, but it still doesn't work. I get a decent scan out of it. On the Samsung tablet, when I try to save it doesn't give me the option to save as a PDF. On a cell phone, it offers me the option to save as a PDF, and it's supposed to save the PDF to my OneDrive account. But ... after I save, the file isn't in my OneDrive account.
I'm waiting for my Windows tablet to charge so I can try Lens on that, and hope to get a different result. (Yeah, I know ...)