The Order Line Items feature is in the Early Adopter phase. We are actively soliciting feedback from a small set of early adopters before releasing it as generally available. If you want to join this early adopter program, submit a request at Zuora Global Support.
You also need to enable the Orders feature to access the Order Line Items feature. Orders is generally available as of Zuora Billing Release 284 (August 2020). If you are an existing Zuora Subscribe and Amend customer and want to adopt Orders, see What is Orders Harmonization and join the Orders Harmonization community group for more information. If you want to enable Orders, submit a request at Zuora Global Support.
Order line items are non subscription based items created by an order, representing transactional charges such as one-time fees, physical goods, or professional service charges that are not sold as subscription services. With the Order Line Items feature enabled, customers now have the ability to launch non-subscription and unified monetization business models in Zuora, in addition to subscription business models.