Yes. Schema App for Shopify adds JSON-LD for product reviews present on the product pages. In order to get the rich results, you must also install the Shopify Product Reviews Plugin. Schema App uses these reviews to create the JSON-LD for products.   Note, that adding the JSON-LD for your product reviews does not guarantee a rich snippet in search. Google decides when to display the rich snippet.  We’ll make sure you have accurate and comprehensive schema markup to increase the chances of you getting a rich snippet in results.