Fortnite graphics / quality?

I downloaded Fortnite for my mobile phone (iphone 8).

I could not increase the quality in the settings and now I always have to play with the worst graphics.

although my cell phone is not that bad after all?

Why is that?

Because the game is bad

As I said, the chapter 2 graphics is just bad

If the mobile phones are not exclusively specialized in gaming so, have a Samsung Galaxy S9 and can't change anything synonymous. But you can't change that.