Canva (and others) and Accessibility
Canva and similar online document creation tools produce inaccessible PDF files. While they can still be useful for creating smaller single-page graphics to be used in email marketing or print-only flyers, they are not recommended for more complex multi-page PDF documents being distributed electronically. I recommend using Word and its accessibility features (or, if you have the knowledge, Adobe InDesign) to create documents being distributed electronically.