Does WMS Cloud pre-built integrations are limited to use only standard service levels?

Business Requirement :

Rogers business operates with multiple carrier services across the country and we want to use oracle pre-built integrations in order to fulfill all parcel orders.

Current Functionality :

Oracle WMS Cloud use only std integration with few carriers and Limited-service levels and there is no control to either add or update them. But to accomodate business requirement, we need to have multiple carrier and service level combination set it up in WMS cloud. Other than customization, Do we have any other option/approach to achieve this with pre-built?