If I’m following the logic from the other guy, I think that it would be “Microsoft ecosystem”, not “XBox ecosystem”, since they’re removing the specific platform, and adding the company. Which I think works.
Kinda. On PC you still use the Xbox app and game pass has Xbox branding. It’s not just about OS, it’s about store sales.
My point is that technically everyone that bought it bought it on iOS. The figures are the same whether you look at iOS sales, MacOS sales or “Apple ecosystem” sales.