Is the API of ActionDispatch::Journey::Route considered public and stable?

I’m looking at using the ActionDispatch::Journey::Route objects in Rails.application.routes.routes to generate Typescript files with all of the routes available. When investigating though, I noticed that the details of ActionDispatch::Journey::Route are not included in the Rails API documentation.

Does this imply that the API for Route is not stable? And if it’s not stable, does that mean it may change between point releases? Or even bug fix releases? Or just major releases?