Delta extraction in RAP odata service

[hnguyen_kinaxis]

Hello,

I have created a CDS view named Z_MATPLANT with CDC annotations for delta extraction on table MARC. It runs fine in the test program RODPS_REPL_TEST as I can see delta records only.
Now I am trying to expose this Z_MATPLANT view in an odata service by creating RAP Service Definition and Service Binding on SAP premise.

Then I test it in Postman but it returns full data only without delta (even with prefer:odata.track-changes in header).

How do I go about this delta issue in RAP odata service? Since Full Extract is working in RAP already, I am trying not going through FactsOf and DeltaLinksOfFacts in SEGW if possible.

Thanks in advance,

Hung Nguyen