Yeah. I also had to get down past all of their points before I saw the images to understand what this is. And one of the points ironically said that it didn't waste my time.

I've never heard the term "loader" being used here. Since a loader would be something that loads. These don't load anything, they just indicate that loading us happening. I typically call these "spinners" or sometimes "throbers" as that is what they do.

I would strongly recommend write "loading spinners" into one of the first sentences on the page.