I have lived in India Indian Government can’t hide anything from the private media houses which operate theirIts not easy to hide massive amounts of death. There's like millions of foreigner living in China that can speak out the truth, satellite technology to spot mass graves and smokes from crematorium, and testimonies from relatives of the dead. Back when India got their Covid wave, we've seen mass graves, cremation and black plumes spotted using satellites. Also those deaths will show up in statistics, or maybe rebranded as excess mortality like the West have been doing with "deaths found with covid, but not caused by it"
The data may or may not be accurate but nobody in India actually wants to hide anything they don’t have the culture of hiding
I don’t think that’s the case in China , North Korea or Even Vietnam