More tag doesn’t work

It’s working for me.
Just tried using more tag in a post and standard post format.

Strange. The next page works but not the more tag in post, page or LearnDash Lessons.

@debbiosganian Can you provide a link to your site?

The More tag only applies to the blog page (aka blog index). It serves to display a portion of the post on the blog only, so you won’t see a change on individual posts or pages.