I see Shopify now supports split shipping: https://help.shopify.com/en/manual/checkout-settings/split-shipping
We are using the Carrier Service to provide custom rates to our users: https://shopify.dev/docs/api/admin-rest/2024-01/resources/carrierservice
Right now when a custom checks out with a cart:
1. with several products with different shipping rates,
2. using our CarrierService rates,
3. `Show split shipping in checkout` is checked in the settings
Then the cart only displays the intersection of shipping rates, and not a split shipping.
How can we use our custom rates with split shipping?
Thank you
