That sounds highly implausible to me, even restricting it to peak commuter hours.

I am not sure about that factoid, but before pandemic in FY 2019-20 IR did 8.08 Billion trips. IR runs in losses for passenger service, it makes up for those losses in freight service.

ref: https://indianrailways.gov.in/railwayboard/uploads/directora...

Only if it is very long.

That would mean the average person is on a train for 2.4 hours per day. That doesn't seem possible.