You’re welcome to tinker, but there’s plenty more to do to make this really be something that we are prepared to fully support.
There’s a fair bit of overhead involved in maintaining the index topics, which is what is driving the UI for the sidebar, and no built-in system for ensuring that they remain consistent with the topics in the category.
We’re accepting that overhead for maintaining the docs here for now, with a focus on gathering feedback from people about the experience of reading and browsing documentation here. We’re looking for that kind of feedback right now moreso than feedback about what it’s like to maintain documentation using this component.