How to mute categories?

I’m looking for the UI to mute a category, which is one of the notification status states according to How do I subscribe to categories and topics? - FAQs - Mozilla Discourse which is the link given in Discourse Migration Guide — LLVM 13 documentation
It says to navigate to the category and set its notification status. But I’m not seeing anything that looks like the image in the above faq post.

Here is what I see in when I click on the bell:

Do you see something different?
(Also did you enable the mailing-list mode in your settings? It would override the per-category notification setting I believe)

So the bell is a button? I hadn’t realized… it doesn’t have any pop-up help.