Same here with UE 5.3 and iPad (6th generation) running iOS 17.4.1.
After having problem with my game, I decided to try building the temp first person project that comes with unreal. Still getting a black screen.
When running my actual game on my iPad I can see only the UI and also hearing the SFX, even footsteps if moving the analog. However the world is pitch black, looks like it’s not rendered at all. Could it be something related to lighting?