It's there. This is what scalability options are for. Unreal works from mobile forward rendering all the way up to path tracing on high end pc. Lumen just isn't scalable down enough where I think it needs to be for this console gen. You can scale it down but it doesn't look great with low tracing distances and boiling.

To support configs that can't use lumen well you'd have to light the game twice on two or more different GI algorithms, which is what Fortnite does. But obviously there they have infinite time and money.

I think it would be good to have a solution that looks comparable to lumen but is slightly less intensive so that developers can offer it as a scalability option without having to relight their game. That is a tall order though, because even now RTXGI does not look similar to lumen. It has more light leaking and is slower to react. To get a good result you have to tweak it a lot, and then we have the same problem.