Three objects that are likely to get created in Order Management as an order progresses through its lifecycle are:

Fulfillment Order. A Fulfillment Order is a record that represents a group of products in an order that are fulfilled together from thesame location. A Fulfillment Order has a lookup relationship to the Order Summary object, and it contains information such as the fulfillment location, delivery method, status, etc.

Return Order. A Return Order is a record that represents a return requestfor an order or part of an order. A Return Order has a lookup relationship to both Order Summary and Change Order objects, and it contains information such as the return reason, status, date, etc.

Change Order. A Change Order is a record that represents achange request for an order or part of an order. A Change Order has a lookup relationship to the Order Summary object, and it contains information such as the change type, status, date, etc.

Verified References: https://help.salesforce.com/s/articleView?id=sf.order_management_fulfillment_order.htm &type=5 https://help.salesforce.com/s/articleView?id=sf.order_management_return_order.htm &type=5 https://help.salesforce.com/s/articleView?id=sf.order_management_change_order.htm &type=5