Hello Shopify Staff,
there is no way actually to add/remove/modify custom Attributes on order LineItem with any API ( Fetch & GraphQL)
(you can actually only remove it directly from shopify admin )
I think it’s really important to add it.. Since it’s already available on subscriptions ?
it’s a very asked request and would be great to see it on upcoming updates !
Thank you 
Hi @SPEAZ ,
Thanks for the feedback.
I’ve added a note on this topic for our product team, but the more context you can add on what workflows you are working on, or how this is preventing you from implementing a specific feature within your app the better.
Cheers,
Thanks @ShopifyDevSup 
It’s mandatory when merchant want to change something after they made the order! right now the only way is to cancel the order and make another one if they want to change the attributes , so the ability to directly change / or add a line item with custom attributes would have a high value!
here is some others post who request the same feature :
https://community.shopify.com/topic/1382037
https://community.shopify.com/topic/1679055
Hi @ShopifyDevSup ,
We are also blocked by being unable to update Customer Attributes on the Order Line.
Our use case is to add identifying information for the specific product fulfilled on the line item. This is essential for a number of market opportunities including consignments, recycle/second use, exclusive product drops, and serials. While there are other ways to associate information, the Line Item Properties/Custom Attributes are unique in that they flow through to most shipping and fulfillment solutions automatically. This creates a more stable solution for the merchant that is resilient.
Hey @Evan _brubaker1, thanks for sharing that context. I’ll pass that on to our product teams!
Kind Regards,
