How to output new fields using Magento 2 REST API?

[nmetcalfe]

We are trying to return the 'Buyer Name' and 'Comment' fields with our order information using the Magento 2 REST API. The endpoint we are using is below:

/rest/all/V1/orders/:orderid

It returns all order info except the new fields.

Is there a way to return this data via an API call?