Two systems, one order → status lives on the Shopify order.
Orders had to reach an external fulfilment provider, and support was answering delivery questions from two systems.

A supplement brand
Orders pushed to the fulfilment system with status written back to Shopify, so support answers from one screen.
Support answers delivery questions from one screen.
Admin API, webhooks, third party fulfilment API
Orders go to an outside fulfilment provider and support checks two systems to answer one question.
Redrawn for privacy



Facing the same constraint?
Tell me how it shows up in your store, and I will tell you the sensible next step.