Hello @tiryoriginals and @outsidegang,
At this time, Klaviyo does not have a direct in-house built integration with Shopify’s own Product Review App. Due to this lack of this connection, Klaviyo would not be passed this review data to indicate if a contact has left a review or not. This does not mean you could not sync this sort of information with Klaviyo. You can still pass this information to Klaviyo by seeing if Shopify has developed their own connection to be sending this review data to Klaviyo or creating your own custom integration by leveraging Klaviyo’s API.
You can find out how to create this custom connection from our following articles:
Alternatively, Klaviyo does offer our own pre-built Product Review Flow which is available to you within the Flow’s Library. You can learn more about how this flow functions in the Creating a Product Review Flow and in a similar post answered by @dov.derin below:
As Dov has also mentioned, other alternatives you have would be connecting a third party review app such as Stamped.io, Yotpo, Loyalty Lion, or ReferralCandy to name a few, who have developed their own integration with Klaviyo. Since these apps have created their own integration with Klaviyo, they would be passing certain event data to Klaviyo such as if a customer has provided a positive or negative review.
Thanks for being a part of the Klaviyo Community!
-David