Access Azure Service Bus Behind Private Endpoint| From Microsoft Fabric | Publish and Read Message

Hi RajeshKapur 
Sorry for the misunderstanding the limitations. After a through research found the direct access to Azure Service Bus via private endpoints from Fabric Notebooks is not supported at this time.
Managed private endpoints in Fabric currently support data sources such as Azure Storage and Azure SQL Database, but not Azure Service Bus.

While direct notebook access is limited, Fabric's Event Streams feature allows integration with Azure Service Bus. This setup enables messages from the Service Bus to be fetched into Fabric's event stream and routed to various destinations within Fabric.
Reference link : https://learn.microsoft.com/en-us/fabric/real-time-intelligence/event-streams/add-source-azure-service-bus

If the above information helps you, please give us a Kudos and marked the Accept as a solution.
Best Regards,
Community Support Team _ C Srikanth.