my iphone 11 has started showing a battery in the middle of the screen i cant get it off its covering apps

Try do “hard reset” on your iPhone 11 Pro, rapid press and let go volume up button, rapid press, and let go volume down button. Press and hold power button, until Apple symbol appear on screen, let go. If still showing battery in middle of screen, take your iPhone to Apple Store, or Authorized Apple Service Provider for diagnostic. Somebody can find out what’s going on with your iPhone.