Hi Vinodhini,
Can you describe what you wish to appear in a single tab of the Operational Dashboard.
The Operational Dashboards and Work Queues are still being developed. If what you are trying to achieve is something that might be considered generic, then you should raise an IBM Idea and let people vote for it.
I've just created 8 Ideas on the Operational Dashboard to close the gap to the Start Center functionality. You can get all the links here, perhaps your requirement is one of the these. https://www.linkedin.com/feed/update/urn:li:activity:7354101685465542656/
Regards - Andrew