lineItem.discountedTotalSet can optionally include code based discounts
API
Effective February 23, 2024
As of the 2024-04 version of the GraphQL Admin API, you can use the new argument withCodeDiscounts on the order.lineItem.discountedTotalSet field to include or exclude line item discounts originating from a discount code. The current behaviour of discountedTotalSet is to exclude code based discounts and as such, the default value for this option is false so there will be no change required for clients who want to continue to have them excluded.
See the documentation for discountedTotalSet on Shopify.dev. The argument is already available on the unstable Admin API.