Added iOS 14 beta support in our application releasing in this August

Our iOS app release is planned in mid of this August (before iOS 14 public and Xcode 12 GM release which is expected to be released in September). 

As per iOS 14 beta, have used below code to handle few scenarios to support our app in iOS 14.
  1. Added below key to my application's Info.plist to prevent the automatic alert to update the users limited photo library selection in iOS 14.

PHPhotoLibraryPreventAutomaticLimitedAccessAlert = YES

2. Used below code snippet to handle few scenario.

if (@available(iOS 14.0, *)) {}

As per this link : https://developer.apple.com/support/beta-software Apps that are created using beta versions of Xcode or that are built for beta versions of an OS will not be accepted on the App Store. 

Though I am using Xcode 11.5(Recent GM version), would really like to know if the above code snippet will cause app rejection? If in case yes, what would be the alternate way to handle iOS 14 support.
Any update on this you may have would be really appreciated.!
Added iOS 14 beta support in our application releasing in this August
 
 
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