List is not sorting

Page is just a sample post. I have about 740+ tags and really just want to list about 25 of the most frequently used ones. But the list won’t order itself by number of posts, which I think is a basic function (right?)… Site uses current version of WP (5.5) and PHP (7.3 I think).

Any idea why this isn’t working and how to fix it? Thank you!

The page I need help with: [log in to see the link]