PDFs, security, ADA/Accessibility

I'm a back end developer who knows about front end technologies but doesn't do design work (for Reasons).

Anyway, I've been tasked with creating a PDF file of some student records that can't be edited, copy/pasted, etc.

I know about digitally signing, etc. but I'm wondering if I simply flatten the whole document to a "image style" PDF vs a "text style" PDF will it remain Accessible, specifically ADA compliant? I'm thinking of screen readers, since there would be no "text" to select, there would be nothing to parse/read/etc.

(For non-US folk - the Americans with Disabilities Act which is federal law that requires Accessibility)