[Flutter] Flutter: Enforcing an orientation doesn't work for all iOS versions?

I have a problem with the orientation of the CameraPreview in flutter. It always switched to landscape mode when I turned it which also distorted the image it was recording. I did not want this, so I added the following to the main.dart:

await SystemChrome.setPreferredOrientations([
DeviceOrientation.portraitUp,
]);



This fixed the problem for android but iOS was still bugging. So, I added the following to the info.plist:

<key>UISupportedInterfaceOrientations</key>
<array>
<string>UIInterfaceOrientationPortrait</string>
</array>
<key>UISupportedInterfaceOrientations~ipad</key>
<array>
<string>UIInterfaceOrientationPortrait</string>
</array>
<key>UIRequiresFullScreen</key>
<true/>


and on my iPhone iOS 11 17.6.1, this did the trick. However, on other people's iPhones (iPhone 14, 17.5.1; iPhone 13 Pro, 17.6.1) this did not solve the issue. The os is still turning the screen and thus distorting or showing the preview in a really small window at the top of the screen.

I have to admit: I am clueless of how to proceed due to my code working on some devices and some not.

Do you have any hint or idea?

Much appreciated!

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