Lulu integration

[echohumm-spec]

Hello, I have an existing approved seller app, (App ID asigned), used only for my own Etsy shop.
The app connects my shop to Lulu for fulfillment of books based on our original designs.
Lulu is disclosed as a production partner in my shop.
I’d like to confirm whether this seller app setup is eligible for approval to use createReceiptShipment for marking fulfilled orders shipped.
If there are any additional requirements or limitations for this endpoint with a production partner workflow, I’d appreciate clarification.
Thanks!