One interesting thing I noticed after updating to iOS 18 specifically, is the removal of reader mode as a "mode". It's now OFFERED to you in the new view menu b

One interesting thing I noticed after updating to iOS 18 specifically, is the removal of reader mode as a "mode". It's now OFFERED to you in the new view menu based on some heuristic about the page that Apple has determined, but it's not a mode you can turn on regardless of if Apple thinks you're on a "readable" document or not. Frustrating since their "remove distracting elements" feature was a great value-add, done in the same update.