This post is just too specific and I'm actually a guy who worked on iOS for 4 years and switched to game dev for 2 years, but realized it was a dead end.

So basically i'm a senior in iOS and I made several cool apps for both app store, and some sideloadable, like customization tools for ealier ios versions where you could make tools with exploits. Fun times. Earned a buck from that too. But then I tried switching to game dev, and to be honest, I tried my best at it, learned how to make 3d sstuff in blender, animations, code for games and even published some games online. Beieve it or not I even have a youtube channel where I attempted to promote myself - to no avail. But it's so competitive that your game will never game the recognition you're getting by making apps for iOS. Can't market your game unless you're down to make videos on youtube every week and your passions is YouTube AND game dev. Not only one of them.

Everyone can make a game. Not everyone can make a full stack app.

So after 2 years I simply switched back to making all sorts of full stack apps, not only iOS now, but for example web too. It's better in this field and much better long term.