thank your reply, i think the way to save the customAttributes of the line item is store those custom_attributes for line items of orders in a separate database outside shopify.  But it is not perfect

hello Aschweng, is it possible to add customAttributes to line item, i see this  https://community.shopify.com/c/graphql-basics-and/how-to-add-additional-details-to-the-order-once-it-is-created/td-p/1309349 , it work well.but i want to add customAttr...