Sensitivity reading, also referred to as diversity reading, and other techniques such as inclusive language use are gaining increasing importance in the publishing industry. Sensitivity reading has also been considered a subset of beta readers. If you're unfamiliar with sensitivity reading and wondering how to hire a sensitivity reader, here's a brief primer.
A sensitivity reader is someone recruited to read and evaluate a book with a specific topic of representation in mind, one with which they are familiar. Because the author is typically not a member of that minority group (African-American, Hispanic, Asian, LQBTQ, etc.) or does not have firsthand experience with the subject matter they are writing about. The sensitivity reader is recruited to evaluate the book.