It is generally not possible to determine the identity of the person who wrote a Yelp review.
Yelp reviews are meant to be a platform for customers to share their experiences and opinions about a business, and as such, the company has implemented measures to protect the anonymity of its users. This is done in order to encourage honesty and transparency in the review process, as reviewers may be more likely to share their true thoughts and feelings if they do not have to worry about their identity being revealed.
In addition, Yelp’s terms of service explicitly state that users are not allowed to post reviews using a pseudonym or fake name, and that all reviews must be based on personal experiences.
Therefore, if you are trying to find out who wrote a specific Yelp review, it is unlikely that you will be able to do so.