Apple was forced to add 3rd party stores to their devices.
Why didn't they do that for Xbox, Playstation and Switch? They're all locked "walled gardens", where you can't add 3rd party software outside of the official stores.
I also assume Microsoft, Sony and Nintendo would also face more targeted regulatory attention if their consoles were as ubiquitous and utility-like as smartphones are (MS certaintly has for Windows). I would even assume that a company could accelerate this process by being as persistent and public as Epic is in regards to Apple.