Custom link preview for aws domain

I suspect what you're asking is how to create Open Graph meta tags for an S3-hosted site that socials will look for.

You would need to create these in the HTML page you're linking to, and you might look to generate these with a tool like https://www.opengraph.xyz/

Blog here generally describing how open graph tags work: https://ahrefs.com/blog/open-graph-meta-tags/