India Post — India Post My USPS item departed Delhi airport but not been delivered in Mumbai

My USPS package was supposed to be delivered to Mumbai in November 2021, but it still hasn't been delivered. The message says 'Your item departed a transfer airport in INDIRA GANDHI INTL, DELHI, INDIA on November 17, 2021 at 8:25 pm. The item is currently in transit to the destination.'

The tacking number of my package is UM[protected]US.
There has been no real time update on the whereabouts of the package. I've visited my local post office thrice but they have no clue about it.

How do I find out where my package is and is it held up by customs?

I've seen a lot of people with the same grievance, whose packages have been floating in transit for almost 7-8 months, without any resolve to their issue.

Please, help me find my package. Thank you