@Anonymous Yes that helped.
Thank you.
Access to missing product data in Shopify Admin API was the main issue. The product endpoint returned standard product and variant fields, but not some values visible in CSV export, including cost per item, SEO fields, and Google Shopping data.
Key updates:
status; earlier guidance suggested inferring publish state from published_at.Cost Per Item, which is not returned on the product object. It must be fetched through the Inventory Item API, using the variant’s inventory_item_id.Screenshots were important for identifying the admin “Cost Per Item” field and the Google channel metafield examples. The question was effectively resolved for cost data, and the remaining guidance for SEO/Google Shopping points to retrieving metafields per product.