Added azure-notification-hubs tag as the limits in question from from ANH not from Xamarin.
The given limits aren't overly limiting - iOS 13 is the oldest version of iOS still supported by Apple, and it will probably be dropped when iOS 16 comes out later this year as Apple generally supports the latest 3 versions. Android API 26 is six years old and I believe no longer maintained, though the Android support lifecycle is much less centralized than iOS'.