Canvas with fallback and no author supplied accessible name and no explicit role.
Canvas with fallback and an author supplied accessible name via aria-label.
Canvas with fallback and a role of img.
Test results for canvus-
All screen readers and browsers tested announced the text that is in the paragraph inside of the canvas unless the accessible name is set by the author by the aria-label, aria-labelledby, or title attribute or unless there is a role img of img in which case the fallback text is not announced.