A bundle identifier issue doesn't explain why mine would install via plist file on iOS15 devices but not iOS16 devices. Also, I am not distributing my app via the App Store, so maybe I wasn't clear on the problem ...
I have an Enterprise licensed app that I distribute via manifest.plist from a secure internal website. The app will not install on iOS 16 devices, but will install on iOS 15 (and older) devices. Other than the iOS version, there are no differences.