I am developing a sample app using sap rap.
The odata service version is v2.
When to use draft and when not to use draft
The fiori screen is too different.
When using draft, items (child assignment) can be entered on the edit/create screen.
If not using draft, on the edit/create screen
It is not possible to input items(child association).
Also, we've seen this symptom be the same in both managed/unmanaged scenarios.
My goal is to have header(root BO) and items(child BO) input simultaneously on the fiori screen without using draft.
Is my goal a feature that is technically cleared?

- not using draft screen

- using draft screen