We have to enable draft for our Business object in the Behavior definition if we want to improve user experience. In this video, I have explained what is draft design time and runtime concepts.
Draft will be handled by the framework even for Unmanaged Behavior definition
Watch Part 1 - Overview of Draft handling - • Overview of Draft Handling & Why do we nee...
SAP RAP playlist - • Managed Restful ABAP Programming Model (RAP)