Please make sure to follow these rules as a general guideline to fulfill order sync.
- Make sure the SKU is available on the products.
- Make sure SKU matches both on Etsy and Shopify.
- Make sure all the variation combinations are available on Etsy and Shopify.
- Make sure the product is uploaded from ExportFeed and only the order can be managed, if not uploaded from ExportFeed, contact support and will help you link Shopify and Etsy products.
- Make sure the product is in stock.
- Make sure the product quantity is tracked.