[iOS] Setting background color on the Searchbar - fix

src/Controls/src/Core/Compatibility/Handlers/Shell/iOS/SearchHandlerAppearanceTracker.cs

@@ -177,7 +177,10 @@ void UpdateSearchBarBackgroundColor(UITextField textField)
 			backgroundView.ClipsToBounds = true;
 			if (_defaultBackgroundColor == null)
 				_defaultBackgroundColor = backgroundView.BackgroundColor;
-			backgroundView.BackgroundColor = backGroundColor.ToPlatform();
+
+			UIColor backgroundColor = backGroundColor.ToPlatform(); 
+			backgroundView.BackgroundColor = backgroundColor;
+			textField.BackgroundColor = backgroundColor;
 		}
 
 		void UpdateCancelButtonColor(UIButton cancelButton)

src/Controls/tests/TestCases.HostApp/Issues/Issue23325.xaml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<Shell xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+       xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+       xmlns:local="Maui.Controls.Sample.Issues"
+       x:Class="Maui.Controls.Sample.Issues.Issue23325">
+        <ShellContent>
+            <ContentPage Title="Main page">
+                <Shell.SearchHandler>
+                    <SearchHandler Placeholder="Search..."
+                                SearchBoxVisibility="Expanded"
+                                BackgroundColor="Red"/>
+                </Shell.SearchHandler>
+                <Label Text="Hello, Maui!" AutomationId="label"/>
+            </ContentPage>
+        </ShellContent>
+</Shell>

src/Controls/tests/TestCases.HostApp/Issues/Issue23325.xaml.cs

@@ -0,0 +1,17 @@
+using System;
+using Microsoft.Maui.Controls;
+using Microsoft.Maui.Controls.Xaml;
+using Microsoft.Maui.Platform;
+
+namespace Maui.Controls.Sample.Issues
+{
+	[XamlCompilation(XamlCompilationOptions.Compile)]
+	[Issue(IssueTracker.Github, 23325, "Setting background color on the Searchbar does nothing", PlatformAffected.All)]
+	public partial class Issue23325 : Shell
+	{
+		public Issue23325()
+		{
+			InitializeComponent();
+		}
+	}
+}

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue23325.cs

@@ -0,0 +1,28 @@
+#if IOS || Android
+using NUnit.Framework;
+using NUnit.Framework.Legacy;
+using UITest.Appium;
+using UITest.Core;
+
+namespace Microsoft.Maui.TestCases.Tests.Issues
+{
+	public class Issue23325 : _IssuesUITest
+	{
+		public Issue23325(TestDevice device) : base(device)
+		{
+		}
+
+		public override string Issue => "Setting background color on the Searchbar does nothing";
+
+		[Test]
+		[Category(UITestCategories.SearchBar)]
+		public void Issue23325Test()
+		{
+			App.WaitForElement("label");
+
+            // The test passes if search handler is red
+			VerifyScreenshot();
+		}
+	}
+}
+#endif