analytics only work on one page

I tryed to add the google analytics code via rankmath on my website: https://dk-finanzdienstleistung.de/
but it only works on the https://dk-finanzdienstleistung.de/kontakt/ page, I checked the page headers in the devtools and the rankmath code got added to all pages, I also tryed to set up a new analytics property but I have the same problem. I couldnt find help to that issue in the Internet, I hope you can help me out.