One tracking detail I’ve been testing in a Shopify Partner sandbox: a Purchase event can appear in GA4 while the transaction_id still needs explicit verification for order-level reporting.

For my self-directed QA case, I added a GTM data-layer variable for transaction_id, mapped it to the GA4 purchase event, and checked one sandbox order in GA4 Realtime/DebugView.

This is sandbox testing—not client work, production validation, or evidence of revenue or ROAS improvement.

Case study: https://contra.com/p/WOvo2olo-shopify-to-ga4-purchase-tracking-transaction-id-qa Technical reference: https://github.com/muslim-rashdi-ecom/shopify-first-party-measurement-gateway