Hi guys,
On further analysis, it seems that the issue is not with BIW or BODS. The problem is with the FM which I have used in the extractor "MD_STOCK_REQUIREMENTS_LIST_API".
When I am executing this FM in my extractor through tcode RSA3, then it is giving 13 records in structure MDPSX. Whereas, the same returns only 5 records when executed from BIW or BODS.
I checked the authority-check angle but the BIW user have SAP_ALL authorization in background.