@Me-Ann Gianan We need more information to be able to provide guidance. Where are you getting the results from (which application are you using? Can you share a screenshot or the actual result removing PII/any non-public information?
From the application consuming AI Search you would need to map the fields you needs displayed and you would need to make sure that the field you want as part of the result is marked as "retrievable" in the index:
Through the Azure portal you should be able to see the indexes under Search Management, click on his index and under fields see if the one you need is marked as retrievable.
If it is retrievable, you would need to map the fields you would need displayed as part of the citations. For example, if you are working from AI Studio to get the index data, there is a section to map the fields you need displayed when adding the index: