I have developed an iPad application which is working fine on iPad mini and iPad 2. The issue is while I try to run it in iPad Pro, it displays like in the size of iPad Air 2. Please refer the screenshot. It is working fine in iPad Pro simulator.
try adding default image
2048 x 2732 (for portrait)
2732 x 2048 (for landscape)
and if you are using storyboard you can also do this
open storyboard select screen change wAny hAny to wRegular hRegular and see if its reflect in preview? as per you requirement.