Creating CDS (Core Data Services) views in SAP S/4HANA and exposing them as OData (Open Data Protocol) services is a two-step process. Here's how you can do it:
Create a CDS view:
Start the ABAP Development Tools (ADT) in your SAP S/4HANA system.
In the ABAP perspective, create a new ABAP project.
Right-click the project and choose "New" > "Other ABAP Repository Object."
In the wizard, choose "CDS View" and enter a name for the view.
In the editor, define the data structure for the view using the CDS syntax.
Save and activate the CDS view.