Fillig page with api SEO consequensens

Hello, i have a question regarding my website and the way content is generated on my website. I have two systems; one where information about venues is created and stored, pictures, text etc. And a website (wordpress) where that content is displayed.

The first system has one API that fils the page with the content the url will look like this myWebiste/locatie/229/nhow-rotterdam/

In wordpress i have one standard page where the content is loaded in, this means the pages don't realy exist in wordpress. I tried making a sitemap and it obviously didnt include the pages with the error (wrong date).

My question is how do i fix/optimize this if possible?