I tried some things but not working ,

ngl the callback manager is kind of deprecated (and scary to work with)

Its being replaced with the instrumentaiton system. https://docs.llamaindex.ai/en/stable/module_guides/observability/instrumentation/?h=instrumentation

I would create a custom event handler and process the events that matter to you

I tried custom event handler as well and passed it into the root dispatcher, in my callback.py script the code for event handler is present

but that also didnt really work

what do you mean though by "didn't really work"

The print statements were not rendering anyways We moved to a different approach, thanks !