Howto: Debug iOS & tvOS
Xcode instructions to launch iOS/tvOS applications on your device and debug them.
iOS and tvOS both require Xcode to debug code in C++ projects. There are unique processes for launching and debugging on both types of devices, as well as accessing crash reports and logs.
The how-to guides here will provide instructions on how to use these processes with Unreal Engine: https://docs.unrealengine.com/5.1/en-US/debugging-for-ios-and-tvos-devices-in-unreal-engine/