It kinda does? You have to use a third party app like lutris/heroic.
You could argue that steam doesn't fully work on linux either (multiple windows like chat, friendslist or library opened on the same workspace regularly crash on Wayland and I havent had the steam overlay working on any non linux native game) but these features arent even part of the epic launcher
There aren’t computers strong enough to produce thousands or millions of planets that all have genuinely interesting features on them that are worth exploring for.
I don't think there is an infinite amount of "genuinely interesting features" so it's hard to imagine we'll ever get a game with this.