That’s not a real thing though, it’s just used to describe nations that have more content than others.
When it comes to modern air China very much is a major nation competing with the US and once we pass into 5th gen even surpassing Russia in what there is to add.
To be honest I don’t understand why they don’t focus more on the simulator mode, with a little more effort it would become the best aviation simulation game, well ahead of its competitors