CMS Collection Pages Won't Publish

I’ve added a bunch of Events in my CMS Collection titled “Events”. They’re queued up as Drafts, but when I hit publish, they stay as drafts. Anyone have an idea why these won’t publish?

Here is my site Read-Only: LINK
(how to share your site Read-Only link)

Drafts stay Drafts, even when you publish. You need to stage them for publish by going into the individual item and use the drop-down that’s integrated within the Save button.

Screenshot 2021-06-29 at 12.22.39

“You need to stage them for publish by going into the individual item and use the drop-down that’s integrated within the Save button.”

This solution confused me. How can I save an individual item when it’s part of a collection? What is an individual item anyway? Is it an element or a field?

A collection item is like a database record (that contains several fields, which can be connected to page elements), e.g. an article, a profile, or a file