Theming Storybook

I have been building several react components as libraries to use as part of a bigger idea.

While writing up documentation I realised the examples I provided were Stories I had created for Storybook to test the look of the components.

The storybook MDX documentation seems to provide a nice way to document your stories.

But I am hitting an issue, ideally I would like the Storybook Sidebar/view to be embedded into my page layout (for consistency) or failing that themed to use the same colours/icons/etc..

The documentation seems out of date with Storybook 8 using a different structure and while I have tried to populate a ThemeVar object it seems several of the fields need specific unspecified input.

Has anyone done anything like this before and how well did it work for you?