Platform:

• Unleashed on Browser

Answer: 

The custom statuses that are available for use in Unleashed aren't available for application or review via the API. 

As the custom statuses are superficial variations of the "Parked" status, any orders created via the API will default to Parked status unless they're posted as Complete, regardless of the custom status that may be applied.
 

Additional Information:

This information is not available in our API docs