It’s not like that. Flutter is not a native UI on iOS it is “Cupertino”. You can run your Cupertino widgets (iOS) on Android with

MaterialApp(theme: ThemeData(platform: TargetPlatform.iOS),

Flutter will always lag Android and iOS in features. AI / AR, Sensors

Flutter is still working on adding Google Maps !!! “The API exposed by this plugin is not yet stable, and we expect some breaking changes to land soon.”

Over time Flutter might also have problems building to the oldest / latest versions of Android / iOS?

As for older versions of iOS …

Android has a fragmentation problem that iOS does not. Apple pushing everyone to the latest OS because of security also helps developers build on the latest API.

As an Android developer I am super excited about Jetpack Compose (see my posts) and as an iOS developer super excited about SwiftUI (see my posts). Native iOS / Android development has never been so good because iOS and Android keep pushing into the future.