Projection Function not returning results

We have created a projection function which returns array of results.

Projection

function ListQuotes List<Structure(ListQuoteResponse)> {
   parameter CompanyId Text;
   parameter ContactPersonId Text;
   parameter CustId Text;
   parameter SalesStatus  Text;
   parameter PageSize Integer;
   parameter PageNumber Integer;
}

PL/SQL

FUNCTION List_Quotes___ (
   company_id_ IN VARCHAR2,
   contact_person_id_ VARCHAR2,
   cust_id_ VARCHAR2,
   sales_status_  VARCHAR2,
   page_size_ INTEGER,
   page_number_ INTEGER) RETURN Proc_Core_Util_API.List_Quote_Response_Arr
IS
   
   quote_request_ Proc_Core_Util_API.List_Quote_Request_Rec;
   
BEGIN

   quote_request_.company_id := company_id_;
   quote_request_.contact_person_id := contact_person_id_;
   quote_request_.cust_id := cust_id_;
   quote_request_.sales_status := sales_status_;
   quote_request_.page_size := page_size_;
   quote_request_.page_number := page_number_;   
   
    RETURN Proc_Core_Util_API.List_Quotes(quote_request_);

END List_Quotes___;

The select query returns results when I make a call.

select * from Proc_Service_SVC.Rd_List_Quotes('ABC01', '106738', '123UK', null, 10, 1, 'ab')

So as below returns results.

DECLARE
   quote_request_ Proc_Core_Util_API.List_Quote_Request_Rec;
   response_ Proc_Core_Util_API.List_Quote_Response_Arr;
   
   temp_ varchar2(32000);
   
BEGIN

   quote_request_.company_id := 'ABC01';
   quote_request_.contact_person_id := '106738';
   quote_request_.cust_id := '123UK';
   quote_request_.sales_status := null;
   quote_request_.page_size := 10;
   quote_request_.page_number := 1;   
   
   response_ := Proc_Core_Util_API.List_Quotes(quote_request_);
   
   dbms_output.put_line (response_.COUNT);
    
   FOR  i IN 1..response_.COUNT 
      LOOP 
         
         temp_ := response_(i).total_orders  || ' ' || response_(i).quote_id || response_(i).return_code;
        
         dbms_output.put_line (temp_);
         
   END LOOP;   

END;

However when we make a postman GET request we get no result.

https://{{baseurl}}/int/ifsapplications/projection/v1/ProcService.svc/ListQuotes(CompanyId='ABC01',ContactPersonId='106738',CustId='123UK',SalesStatus='',PageSize=10,PageNumber=1)

{

    "value": []

}

Any idea what could be causing this problem with the projection?