flutter app not taking full width of ipad screen?

Question

launching the app on android and iPhones works well while launching it on iPad the app unexpectedly is not taking the full width of the screen!

tried editing the Main.storyboard <view> width but nothing occurs

<view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
    <rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
    <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
    <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
</view>

Answer 1

You need to register your app Universal

Go to Runner > Target > Deployment info