Observation Details
Sections, named by ARIA attributes (e.g. <section class="..." aria-label="Live-Sport überall streamen">) will get assigned role "region". Regions are considered landmarks which should be used sparingly for most important landmarks of a page, not for all sections. Page structure after using the main landmarks (header, main, footer, nav) is conveyed by heading structure, rather than manually creating custom landmarks / regions for each section.
Remediation Notes
Remove manually provided regions (named sections) and create page structure through heading structure. There is no need for manually created regions. If one is created manually, it should be a very specific use-case, usually the main function of the page, if it is not already easily accessible in another way.
If for example the main purpose of the page would be the CTA to buy MagentaSport AND the tariff option cards wouldn't already be direct context of the main heading, such section could be named as region.