Not really. GraphQL mostly provides an alternative to REST when you want to select specific fields and traverse down into relationships with a single query.

The closest you could get is the users who rated the business:

  business(id: "garaje-san-francisco") {
    reviewers {
      rating
      user {
        name
      }
    }
  }

If Yelp wanted to enable that use case, they would add a field to Business like `related_businesses` like:

  business(id: "garaje-san-francisco") {
    related_businesses {
      business {
        name
      }
    }
  }