That would in a country with many living day by day, be one difference over say this time last year, in which air-quality would of also been a factor as much as currently. Whilst not good, combined with a reduced nutritional intake, may of tipped the balance.
The oxygen supply shortage is due to demand and whilst does not explain the increase demand and certainly would play into the deaths, it wouldn't be at the scale we are seeing as it is the increase in cases and the oxygen supply shortage is a product of the knock on demand and not a causality in that demand. Yes it is a factor in increased deaths, but not the major factor, which is increased numbers of infected.
The incomes of your average person in India has declined due to the whole pandemic and can be seen here: https://www.statista.com/statistics/1111510/india-coronaviru...
That would in a country with many living day by day, be one difference over say this time last year, in which air-quality would of also been a factor as much as currently. Whilst not good, combined with a reduced nutritional intake, may of tipped the balance.