Image optimization for dynamic but prerendered content

[matiasfha]

Use case: A site that holds many images that are render by a component.
The component just use a simple img tag with src={src}

Question: Is it possible to crawl all the instances of this img tag to get the src attribute, optimize that and replace it with a new value? (And even add new attributes to the element).

What I tried:
I created an svelte-preprocess transformer that accomplish exactly this but not for dynamic sources.
It take all the img tags and get the source correctly.

I also tried to build a Vite plugin but I can't figure it out how to hook into the pre-render output.

What I intend is very similar to a gastby site/plugin that let's you get the entire site content and perform some transformations (since is static)