Rich text can't modify text / add category templates to navigation bar

Without a link to your read only most people won’t bother trying to help you . Update your post.

Please include your site’s Read-Only Share Link with your question.
A read-only link allows the community to view your project without making any edits to it and help diagnose your issue or provide feedback.

If your project has custom code or layout issues on the published site, please share that URL/URI as well.