Deaths in some metro cities due to covid-19 pandemic higher than official numbers

Metro cities worst affected by the covid-19 pandemic
The second wave of the covid-19 pandemic was almost completely unexpected in India
It appears that metro cities like Mumbai and delhi are the worst affected by the pandemic. while the number of new cases in Mumbai is reducing, in delhi the number of cases is very high. According to a times of india, on some days, the number of deaths in bengaluru is twice the official figures based on crematorium data.
A hindi tv channel was claiming that based on data from crematoriums, on one day, the number of deaths in delhi was more than 700, based on the bodies for which the covid-19 protocol is followed