With all good long format contents I see around here, I'm surprised that this feature isn't active yet!
I've noticed that reader view isn't available on Stacker.News website. This is a major issue for accessibility and I truly believe it should be addressed as soon as possible.
Unfortunately there's no standard to define how each browser will enable that option. In my experience with Brave and Firefox, none allowed me to browse the site on a much readable view.
Please consider it!
<section>
or<article>
semantic tags could be one option.