And 90% of money spent on mobile is for some sort of virtual item slot machine.

But how much % of these mobile gamers are using iPhones, I wonder.

AFAIK developing countries are dominating mobile gaming for a simple reason that they cannot afford PS/Xbone/PC. Ergo no iPhone for them to begin with.

Interesting number, but how many are actually that GPU-intensive?

A surprising amount. Genshin and many Gatcha games are GPU intensive, even on such a small screen.

It might be because they code very inefficiently, and they might also be doing a ton of crypto and anti-hacking calculations in background, but these games are surprisingly taxing for the phone they're running on.

I think a substantial amount at least. Kids and tweens seem to game a lot on mobile, and Fortnite is a GPU-intensive game that runs on mobile.

It's literally not on iOS though