I created an app for Hololens 2 using Unreal and following all steps of the chess tutorial instructions (https://docs.microsoft.com/en-us/windows/mixed-reality/develop/unreal/tutorials/unreal-uxt-ch1). It sounds like 60 FPS should be possible and is ideal for apps on Hololens 2 (https://docs.microsoft.com/en-us/windows/mixed-reality/develop/platform-capabilities-and-apis/hologram-stability). However, the app is consistently running at 15 FPS, according to both Unreal's stat fps command and the Hololens framerate counter display. The same is true in all apps I have created in Unreal. The framerate is 60 FPS for the main menu and when running non-Unreal apps such as Tips.
How do you get the tutorial Unreal app to run at 60 FPS on Hololens 2?