Not all sections are appearing when trying to link an article

I have read the other posts and it seems others have had similar issues. When searching for a section to place an article, they are not all showing, or they are not all available. In this particular situation, the category I am clicking into shows no sections within it - when it should have 18, and each of those should have multiple sections. Is there a setting that needs to be clicked to ensure these show up and are available?

Thank you.