WARNING ITMS-90901: "Missing full-screen support for the latest iPad mini display

Solution 1:

We have two options here

1. UIRequiresFullScreen=YES to your app’s Info.plist in order to keep your app full screen during multitasking, you’ll need to recompile with Xcode 13 and the SDK for iPadOS 15
2. Don’t include this key in your Info.plist file if your app supports iPad multitasking and is capable of running alongside other apps. If this key is absent, or is present and set to NO, the system lets your app share the screen with other apps. Can work with Xcode 12.

Solution 2:

You've to recompile your code in XCode 13+

and for further details please visit Apple's News and Update