Usa put a ban on essential chemical products reqd for stabilization of vaccines. Hence the delay . It was only lifted on Modi's intervention.As regards Covid-19 UK vaccine that India got a licence to produce on condition it shared fairly with other 3rd world countries.
Whatever goodwill you generated was totally wiped out by banning exports to BD in late March of millions of doses that BD had paid for.
This action cost 10s of thousands of BD lives lost over the next 6 months.