Answer by Liyun Zhang - MSFT for .NET MAUI: Unwanted whitespace at bottom of screen in Android

This is the default navigation bar for the android. You can put the following code in the OnCreate methoed of the Platforms/Android/MainActivity to hide it:

 protected override void OnCreate(Bundle savedInstanceState)    {        base.OnCreate(savedInstanceState);        this.Window.DecorView.SystemUiVisibility = (StatusBarVisibility)                (SystemUiFlags.ImmersiveSticky | SystemUiFlags.HideNavigation |                 SystemUiFlags.Fullscreen | SystemUiFlags.Immersive);       // old api without showing hide animation       //this.Window.InsetsController.Hide( WindowInsets.Type.SystemBars());        //new api with hide animation    }

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You can put the following code in the OnCreate methoed of the Platforms/Android/MainActivity to make the navigation bar transparent:

protected override void OnCreate(Bundle savedInstanceState){   base.OnCreate(savedInstanceState);   Window.SetFlags(WindowManagerFlags.LayoutNoLimits, WindowManagerFlags.LayoutNoLimits);   // this line will make the status bar and navigation bar transparent   Window.SetStatusBarColor(Android.Graphics.Color.Blue);  // this line to keep the status bar color}