Support standard add-to-cart tracking for STOQ preorders

When customers click the Pre-order button, the item is added to the cart successfully, but Shopify’s standard product_added_to_cart event is not published. STOQ only publishes: stoq_preorder_added_to_cart

This affects our Google Analytics, Google Ads, Merchant Center, Meta Pixel, and TikTok Pixel tracking because these integrations rely on Shopify’s standard add-to-cart event.

Checkout and purchase events are still tracking correctly, so the tracking gap is limited to the preorder add-to-cart step.

We are requesting the following improvements:

• Publish Shopify’s standard product_added_to_cart event alongside the STOQ event.

• Expand stoq_preorder_added_to_cart to include price, currency, quantity, product title, variant title, and SKU.

At present, the workaround is to create a custom Shopify Web Pixel that subscribes to stoq_preorder_added_to_cart. However, the current payload does not include all standard commerce fields, so additional cart or product lookups may be required.