In which python environment all the airflow utility file is installed. I hoped it might be .meltano/utilities/airflow but the airflow instance running from there and running from meltano is completely different. Help me with this

How did you confirm it "is completely different"?

well i run the airflow from both of the environment : one with the meltano invoke airflow shceduler and other with activating the environment where utility is installed and found out the dags , users , schedulers which were completely different.

Meltano injects the configuration at run time when you call

meltano invoke

.

which airflow db does meltano use ? having configured user role previously with meltano , I had to reconfigure this when running this under utility environment.

You might wanna read through https://hub.meltano.com/utilities/airflow/

there is not any detailed info about this here