Improve Fortnite mobile graphics?

My Fortnite mobile graphics have worsened greatly with the last update I play on the 2018 iPad with 128 gave space. How can I undo the already restarted deleted game… What I find funny is that I only graphics on low or Car can put

It may be because the game has needed more system resources since the last update, and your iPad does not provide enough power for better graphics.

Thank you