The biggest region in term of revenues for Apple revenues is all americas but it is still only around 43%, which means Apple still makes money from Africa, Europe, Asia and Ocenia combined than the whole american continent. So that is even less for the USA.
The sum of all these smaller markets is still bigger than the US one.
When measured in terms of mouths, yes, but when measured in terms of surplus spending power than can go to Apple, certainly not.
India has 1.3 Billion people in terms of counting mouths, but not wallets with $1000 to send to Apple for a new iphone.
The biggest region in term of revenues for Apple revenues is all americas but it is still only around 43%, which means Apple still makes money from Africa, Europe, Asia and Ocenia combined than the whole american continent. So that is even less for the USA.
https://bullfincher.io/companies/apple/revenue-by-geography