Perhaps. Have you ran the code on Windows? From your answer it seems you are running the test on Mac.
Anyway, I’ll sum it up:
Corona Pro version
PC OS: Windows
Corona Simulator Skin: IPhoneX
Build: 3157
Code: local topInset, leftInset, bottomInset, rightInset = display.getSafeAreaInsets()
Result: topInset, leftInset, bottomInset, rightInset are all zeroes.
Expected: topInset, leftInset, bottomInset, rightInset should not be zeroes.