hmmm, yea this would require some additional features or even a different theme component altogether. To make this component work with individualized content, you’d have to install a different copy of the component for every different banner you want. I mean, I can think of a way to do what you are asking with multiple installs of this component and some css, but it’s a bit of a hacky solution.
The welcome banner component is meant as a welcome banner. But a category specific info-banner with similar structure built to your needs seems like a solution here. I can definitely see the use case if you are wanting to just have a navigation banner for certain categories (instead of the sidebar, which can be hidden by group/category as well). 