How old are you?

Kamala Harris was already middle aged when the DOCX standard was released or the workflow of converting a word to pdf became common. All of that stuff really didn't hit mainstream until the Obama administration. It would have probably even been longer for a legal office to adopt it.

I think it's safe to say she knows how to use Microsoft Word (or something like Lotus Notes), print a document, and even scan something to a pdf. I bet you could also teach her how to use ether "print to PDF" function fairly quickly. However if you just plop her in front of a computer and tell her to go at it I think the most likely result is Kamala swearing at the ribbon interface..

Early on in her career was before pdfs were a thing.