Is there a way to view which portions of the HTML are rendered from cache?

I was wondering if it’s possible to view whether a section of the HTML was rendered from cache vs non-cache. For example, it would be very useful for us to visually see which parts of the page are cached to help us understand if we need to force break cache.

If it’s in the HTML, it would be simple to write a chrome extension to highlight the cached sections.

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Do Content Delivery Networks (CDNs) play a role in caching HTML content, and can developers leverage CDNs to optimize HTML rendering from cache?