I think your case might be solved with Share Space to the Web feature.
Spaces can be shared to the web (set as Public), it means they will be accessible by anyone and indexed (or not) by Google.
xxx.fibery.io Workspace and make User Guide space Public, then ANY anon visitor will see this Space in left menu when open xxx.fibery.io . Direct link to the space will be . | Fibery
Under the hood we use read-only users mechanism, but multiplex…
Here is an early example how it will look like
https://the.fibery.io/@public/Fibery_Process/Start-5885?app-sharing&enable-views-service
This is our development process that we want to share to the world, and later move User Guide, Changelog and even community into Fibery. It would be great to hear your feedback.