Why is GA4 reporting lower sales than Shopify and Klaviyo analytics?

[vintageart]

I deleted a previous manual implementation of GA4 and used Shopify's Google Channel GA4 integration.  Problem is that GA4 now reports sales  < 25% below that reported by both Shopify and Klaviyo analytics bringing into doubt all GA4 data.  I have seen mention that add blockers are the culprit, but that doesn't jibe with the Klayvio metrics and my previous manual implementation of GA4.  Two questions:  1) what gives? 2) is the solution to ditch the Shopify integration and go back to Tag Manager?

[Barnett4321]

Join the discussion

https://community.shopify.com/c/shopify-apps/ga4-not-counting-every-purchase/m-p/2092034#M63828