Hi @willc, this was noticed at our school too. A chat with Canvas support both clarified and disappointed.
Answer: Immersive Reader is not visible to students unless Pages is enabled on the course navigation menu. I tested and that's how it works for students and in Student View too. The student guide documentation on the feature does say to go to Pages and view the page from there, guess that was a clue. How do I use the Microsoft Immersive Reader when v... - Instructure Community (canvaslms.com). It also works when viewing from a module.
Since most teachers hide Pages, this is disappointing to learn.
Maybe I will write an Idea to make it available with Pages disabled on course navigation. I wish this caveat would be added to both instructor and student documentation, it's important to know.
This discussion post is outdated and has been archived. Please use the Community question forums and official documentation for the most current and accurate information.