Cloudflare Cache Not Caching

Hello there, good day! I'm wondering If I'm doing something wrong, I've a worker site that returns assets from A storage bucket with the cache flag like this:
const fetchBucketContent = async (path: string, bucket: string): Promise<Response> => {
    return fetch(`https://${bucket}${path}`, {
        cf: {
            cacheEverything: true
        }
    })
}


However, when I look at the cloudflare analytics, this is the percentage of cahing I'm getting:

I was testing my site with Webpagetest and GT Metrics multiple times, I want webpagetest and GTMetrics to receive the cahced content and not the worker content. How would I go about that?
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