OutSystems integration with Service Now

We need to integrate the out-systems with Service Now . So after all approval team lead can deploy into UAT 

Yes you can do this... if I understand what you are asking. If you are asking "Can you integrate service now so that it can kick off a deployment?" the answer is yes. Utilize the LifeTime API and build it. https://success.outsystems.com/Documentation/11/Reference/OutSystems_APIs/LifeTime_Services_API