This question is an exact duplicate of:
Google Rich Snippets Not Appearing in Knowledge Panel
Has anyone ran into a situation where their online directory had structured data accepted by Google in the search result (#2 after the local business) but not placed as a review source for the local business in the knowledge panel?
How did you remedy this?
With all of the following being correct:
- The reviews are original.
- There are no errors in the reviews or aggregate reviews
- All schema and best practices were followed
- Domain and page authority are higher than the competitors listed in the knowledge panel