@armenhex The Yoast SEO plugin will help you output structured data (and show a rich snippet in Google results), in order to get the reviews & star ratings rich results in the search results for your website, but there is no specific structured data block for that. You will need to leverage on structured data, as that is what Google will read and use as a basis, in order to decide what to display in the search results (Google announced that they are removing what they call “self-serving” star reviews from the search result snippets which means that reviews created by the site will no longer be displayed in the search results).
Please bear in mind that the star ratings might be scrapped from different sources including Google’s own ratings, so ultimately it’s Google’s decision to add/show these or not.
For more information on the subject please have a look at this article: https://yoast.com/how-to-get-ratings-and-reviews/`\
