You were filtering the sidebar for "consistency", that's not a search box.

From 2026 HIG:

> Create a list of common terms, and reference that list to keep your language consistent. Consistent language, along with a voice that reflects your app’s values, helps everything feel more cohesive.

> Build language patterns. Consistency builds familiarity, helping your app feel cohesive, intuitive, and thoughtfully designed. It also makes writing for your app easier, as you can return to these patterns again and again.

https://developer.apple.com/design/human-interface-guideline...

I'm sure there's others

But otherwise I agree I liked old MacOS design.