Hi @Santhosh,
When using the V2 programming model, functions_app.py is the entry point for the function app, see https://learn.microsoft.com/en-us/azure/azure-functions/functions-reference-python?tabs=asgi%2Capplication-level&pivots=python-mode-decorators#alternative-entry-point. It's used by the host to bind the triggers. You need to you have those trigger methods either defined or referenced in this file.