They’re not an iOS developer, it’s a game engine used for cross platform game development. While there are many mobile games made using unity such as Pokémon GO and similar, there are also a lot of home platform games that use the engine, such as Among Us, Fall Guys, Hollow Knight, Pokémon Diamond and Pearl remakes, Cuphead, Outer Wilds, Genshin Impact, etc.
This issue impacts almost every gamer no matter what platform you are on.
But it’s not cents on the dollar, that’s the problem, it’s just cents, and then more cents, and more cents again, regardless of if you’re selling more. The issue here is that every install costs the developer money. It’s not just a cut being taken from the sales, it’s money coming directly out from the developer’s pocket, in addition to the cut being taken from the sales. And there’s no limit on how many times people could reinstall games, meaning that these charges could just keep going well after a purchase has been made.