How to create multiple shipping costs on a SO line using REST API without multiple SO revisions?

Summary:

Add shipment charges to SO Line

Content (required):

Hi All,

We have a requirement to add multiple shipment costs (such as freight, insurance, duty etc.) received from the source system to an existing Sales Order Line in SaaS using REST API without creating multiple Sales Order revisions.

Note: We are able to freeze price flags and add individual charges which is creating multiple SO revisions. The API is returning 404 error when trying to add multiple charges in a single payload.

We need a SINGLE payload to add multiple costs within a single SO revision.

Uploaded the code snippet used. Below is the rest api used: