Asset Optimization: File already optimized

Hello I have a couple questions about Hummingbird.

The first is that I have a file that is suggested to be compressed by google pagespeed called kirki-styles.css.

I know it’s used by my homepage.

I’ve requested that the file be compressed within Asset Optimization, I’ve visited the homepage and I’ve cleared the page cache, but the file still shows a wheel after 30 minutes that it’s not compressed yet.

How can I get this file to compress?

Also, My report suggests that I Serve static assets with an efficient cache policy
The suggestion is to configure browser caching
I have attempted to do this, but the report is still showing that no caching is setup