I think the obvious match here is how IPFS can use a dnslink TXT file to point to the content-addressable top of an IPFS-distributed static web https://docs.ipfs.tech/concepts/dnslink/ . This is how a lot of dweb/web3 websites maintain and advertise a non-http mirror. It works out of the box for sites served using https://distributed.press/ (non-commercial, open source) or https://fleek.co/ (hosted).
If you use Brave, or have the IPFS browser extension, you can access sites like https://ffdweb.org/ as an option, or preferentially.