Hello,
Thank you for contacting Rank Math today and bringing your concern to our attention.
The closest schema type/property you can add for your testimonials is review.
However, the Review Schema can only be attached to a limited set of Schema types according to Google guidelines: https://developers.google.com/search/docs/advanced/structured-data/review-snippet
If you have one of the valid types of Schema on the page you can then apply the Review Schema with the help of this tutorial: https://rankmath.com/kb/review-schema/
Hope this helps clarify your doubts.
Don’t hesitate to get in touch if you have any other questions.
Hello,
Since we did not hear back from you for 15 days, we are assuming that you found the solution. We are closing this support ticket.
If you still need assistance or any other help, please feel free to open a new support ticket, and we will be more than happy to assist.
Thank you.