Mobile gaming (iOS and Android) dwarves other gaming.
This is the issue that “gamers” have a hard time grappling with because they often disregard mobile games as an inferior product.
But then it leads to the fact that the mobile platforms don’t actually have to cater to their needs other than as halo products. They optimize for the majority of their customers and the majority are mobile gamers who are happy with the range of mobile games available.
Have you seen the type of mobile game which accrues the vast, vast majority of the revenue? They are literally designed as addiction engines first, and games a distant second. They're "games" in the same way that a baited hook is fish food.
The relative handful of actual good mobile games have often struggled, partly because Apple is very happy to promote and take a cut of the enormous revenue generated by this predatory business.
They have a different definition of gaming than we do. The games they're interested in are the ones with in-app purchases.
Except the design department, "good enough" is their motto for everything. "iPhone is the most popular gaming device" and "iPhone is the most popular camera" are two technically correct statements that don't sit right with me, but that's just me.
Apple literally pays developers of mobile games an up front premium to strip out all the Skinner Box nonsense and create an Apple Arcade version of their app.