Sorry @puzzlegal but your opinion about what is known in India is simply not true. The data (discussed extensively in the Opening Schools thread) comes out of the states of Andhra Pradesh and Tamil Nadu in India’s south. As described in the Science article:
What is known there about how much covid-19 there is if anything is superior and MORE accurate to what is known here.
And again, this is specifically on an age cohort to age cohort comparison. Numbers summarized here from source material in table S10 of here. Mortality rates mostly follow along the incidence rates, roughly a third of U.S. on a per capita per age band for most age bands. (For example the biggest age cohort there is the 18 to 29 year old group and they have 27% of the mortality on a per capita basis than the U.S. has.)
In fact they do have a very good “idea of how much covid is in India”. Their system is not with room for errors but if either country is undercounted it much more likely is the United States.