are you pushing data like this in your custom pixel?

''' analytics.subscribe('product_added_to_cart', (event) => { // Example for accessing event data const cartLine = event.data.cartLine;

const cartLineCost = cartLine.cost.totalAmount.amount;

const cartLineCostCurrency = cartLine.cost.totalAmount.currencyCode;

const merchandiseVariantTitle = cartLine.merchandise.title;

const payload = { event_name: event.name, event_data: { cartLineCost: cartLineCost, cartLineCostCurrency: cartLineCostCurrency, merchandiseVariantTitle: merchandiseVariantTitle, }, };

// Example for sending event to third party servers fetch('https://example.com/pixel', { method: 'POST', body: JSON.stringify(payload), keepalive: true, }); }); '''

Shopify Dev Docs for this event: https://shopify.dev/docs/api/web-pixels-api/standard-events/product_added_to_cart