Matomo doesn't track sites apart from the index-page

I’m currently trying to configure Matomo for the website www.leftshift.one.
So far I haven’t managed to track any sites except for clicked links within articles.

Matomo only recognizes the landing page as a site, but any further clicks on articles are only shown as clicks on the main URL. I have implemented event tracking for switching between categories and to the contact form. However, none of the pages/articles is recognized as a page in the overview for visitors behaviour.

How can I tell Matomo what’s a page?