If you can find a way to generate md files from YUIDoc, then Docusaurus could consume those MD files.

We have seen many examples of Docusaurus sites generating pages from code comments, GraphQL or OpenAPI schemas

For example here's a plugin that does something akin to what you want, but from TS comments: https://www.npmjs.com/package/docusaurus-plugin-typedoc

And here is an example integration of Redoc/OpenAPI in Docusaurus: https://redocusaurus.vercel.app/examples/using-single-yaml/