This is the demo page, mine is not online yet.
On my start page the categories
Services , RecentWorks and Downloads
How can I activate them or make them visible?
Include a link to the source code repository of your project, because we really need the context of seeing your templates and partials to be able to help you. It is trivial to do a quick git clone on your repo, then run hugo server in your project, to help you out. On the other hand, recreating your code from screenshots, or sort of guessing at it, is not.
If you can’t share your repository for whatever reason, consider creating a dummy repo that you can share, which reproduces the problem you’re experiencing.
That’s still not what I asked for. To reproduce the problem and provide a solution, we need access to the entire project, not just the configuration file or URL for the live site.