Alternatives for subpages to structure content

I am looking for an alternative for an index page https://www.big-direkt.de/de/leistungen/pflegeversicherung/pflege-zu-hause.html-0

The problem: There is too much content to arrange it under each other on one single page. It is very complicated to find the right information when the content is split into a lot sub-pages. Also an index page just with cards is very unattractive.

So what could be an alternative? - The space for horizontal tabs instead of sub-pages are too limited - There is too much content in the sub-pages to put it in accordeons instead.

Do you have ideas or examples of alternatives for sub-pages to structure a lot of content?