I went to my profile to create this post. Let's see where it displays.

This is the excerpt from my WP post.

Here is my excerpt. 

Small excerpt. Not details.

This is the small exerpt.

This is only the excerpt. I absolutely hate this post editor. I need to find something much much much better.

I don’t have a clue what a classic block is, but this might do the trick, eh?

This is the excerpt. Boy this is a basic and stupid form.

Category of Uncategorized is now checked - in case that is the issue.