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Xamarin.iOS latest version supports for Xcode 12.5 and iOS 14. If you use VS 2019 16.11.3 and Xcode12.5, you could have a try to use
Manuan Provisioning and check the profile in your mac . However, it doesn't include the iOS 15 SDKs APIs, if you use new features, some unknown error may occur when you deploy it to device.
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