@Kiran Pradeep Welcome to Microsoft Q&A Platform, Thank you for posting your query here!
It’s in our backlog but there is no concrete timeline to share yet.
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Additional information: If you want to get the count when the new queue message has added into the poison queue. You could choose queue trigger. The codes is as same as the timer trigger, just change the parameters.
Workaround: The queue storage trigger runs a function as messages are added to Azure Queue storage.
Gets the approximate message count for the queue:
How to alert on queue size on azure service bus
Monitoring Azure Queue Storage
Monitoring Azure Storage Queues with Application Insights and Azure Monitor
Hope this helps!
If you have any queries or question, please feel free to get in touch with me. I would like to work closer on this issue
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