FIND attached 2 screenshots (OLD_PLATFORM.png & NEW_PLATFORM.png) .
the shared request is working fine in both platform . you are still using wrong request .

I used these input but still getting empty response

I used these input but still getting empty response

use below request :
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ser="http://server.internal.api.srd.nep.mobinets.com/">
<soapenv:Header/>
<soapenv:Body>
<ser:getSubscriberFilledNetworkDetails>
<!-Optional:->
<requestId>01</requestId>
<!-Optional:->
<serviceName>1319442_FBB</serviceName>
</ser:getSubscriberFilledNetworkDetails>
</soapenv:Body>
</soapenv:Envelope>

The output is empty after inserting the data in DB

iI interserted the below data in the DB (OLF and NEW), but when I call the API, I'm getting empty response to verify :

mb0019 1319442_FBB ADSL NODE_001 CPE 150.5 :

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ser="http://server.internal.api.srd.nep.mobinets.com/">
<soapenv:Header/>
<soapenv:Body>
<ser:getSubscriberFilledNetworkDetails>
<!-Optional:->
<requestId>mb0019</requestId>
<!-Optional:->
<serviceName>1319442_FBB</serviceName>
</ser:getSubscriberFilledNetworkDetails>
</soapenv:Body>
</soapenv:Envelope>

<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
<soap:Body>
<ns2:getSubscriberFilledNetworkDetailsResponse xmlns:ns2="http://server.internal.api.srd.nep.mobinets.com/">
<return/>
</ns2:getSubscriberFilledNetworkDetailsResponse>
</soap:Body>
</soap:Envelope>

Salam, I cant provide sample for two reasons : I dont have access/ you have to be able how to describe the API to the customer.
What the API does:
its a read only API that retrieves previously saved subscriber network details for a given requestId and serviceName from SRD_SUBSCRIBER_NETWORK_DETAILS. Returns: accessNodeType, accessNodeId, ceType, distanceToExchange. This API is called internally by the Flowable BPMN process and it is not triggered by a UI user.

Why no UI verification:
SRD_SUBSCRIBER_NETWORK_DETAILS data is not displayed in any UI page. This is a backend integration API only.

How to verify:
Step 1 : Find a request with data in the table:

SELECT REQUEST_ID, SERVICE_NAME, ACCESS_NODE_TYPE, ACCESS_NODE_ID,
CE_TYPE, DISTANCE_TO_EXCHANGE
FROM SRD_SUBSCRIBER_NETWORK_DETAILS;

Step 2 : Call the API with a matching requestId and serviceName

Step 3 : Verify the response contains the same values as the DB row

NB : if no data available run below script to insert testing data :
INSERT INTO SRD_SUBSCRIBER_NETWORK_DETAILS
(REQUEST_ID, SERVICE_NAME, ACCESS_NODE_TYPE, ACCESS_NODE_ID, CE_TYPE, DISTANCE_TO_EXCHANGE)
VALUES ('01', '1319442_FBB', 'ADSL', 'NODE_001', 'CPE', 150.5);
COMMIT;

Is it possible to provide data in the Cloud DB to get some output rather than empty

this API retrieve data from table SRD_SUBSCRIBER_NETWORK_DETAILS, which is empty in staging and cloud databases , so it will always return empty response .