Your immediate and slightly extended circle doesn’t equate to the entire planet. In the UK for instance, it’s closer to 50/50.
Also, much like Windows on the desktop, the email side of things is going to be skewed by business use; I would wager (without the data to hand) that iPhone and iOS is dominant in business, due to the perceived notion of better security and similarity across devices. Though the majority of mailflow globally is spam, or at least greymail, business email outweighs personal use of email. It’s also likely that the majority of Android handsets are merely used as dumb-phones based on engagement. Based on app metrics, iPhone users are more likely to use their device. That is why iOS mail in particular has the market share.
Also, much like Windows on the desktop, the email side of things is going to be skewed by business use; I would wager (without the data to hand) that iPhone and iOS is dominant in business, due to the perceived notion of better security and similarity across devices. Though the majority of mailflow globally is spam, or at least greymail, business email outweighs personal use of email. It’s also likely that the majority of Android handsets are merely used as dumb-phones based on engagement. Based on app metrics, iPhone users are more likely to use their device. That is why iOS mail in particular has the market share.