This week, Epic Games released a significant update for Fortnite, the hugely popular multiplayer game which is on iOS, Android, Xbox and every platform you can think of. The newest update, amongst other updates now supports 120 frames per second on the latest generation of iPad Pro, which is the 2018 model.
Fortnite for iOS is now on version 11.40 and this now includes better support for controllers as well as 120FPS support.
The iPad Pro (2018 release) now supports 120 FPS.
Clickable thumbstick buttons (L3 and R3) are now usable on supported iOS controllers.
The option for 120FPS does need to manually enabled however within the game.
Source: Epic Games