FAQ markup describes content that is not on the page

What this means

A FAQPage block is present, but its first question's text does not appear anywhere in the page's visible copy. Google requires that FAQ content marked up in structured data be visible to the user on that page; markup describing questions the visitor cannot see is treated as a structured-data violation and can cost the site its rich-result eligibility, not merely this page's.

How to fix it

Either render the questions and answers on the page exactly as the markup states them, or remove the FAQPage block. Do not mark up FAQs that live behind a tab the markup does not match, on another URL, or nowhere at all.

Fix effort

This check needs review: the change can be drafted for you, but a person has to approve the wording or choose the target before it ships.

Authoritative source

https://developers.google.com/search/docs/appearance/structured-data/faqpage