fix: Initial focus on Page

src/Uno.UI/UI/Xaml/Controls/Page/Page.mux.cs

@@ -10,6 +10,7 @@
 using Uno.Extensions;
 using Uno.UI.Extensions;
 using Uno.UI.Xaml.Core;
+using Uno.UI.Xaml.Input;
 using Windows.UI.Xaml.Automation.Peers;
 
 namespace Windows.UI.Xaml.Controls
@@ -19,13 +20,25 @@ public partial class Page
 		private protected override void OnLoaded()
 		{
 			base.OnLoaded();
+
 			var spCurrentFocusedElement = this.GetFocusedElement();
 
 			var focusManager = VisualTree.GetFocusManagerForElement(this);
 			bool setDefaultFocus = focusManager?.IsPluginFocused() == true;
 
 			if (setDefaultFocus && spCurrentFocusedElement == null)
 			{
+				// Uno specific: If the page is focusable itself, we want to
+				// give it focus instead of the first element.
+				if (FocusProperties.IsFocusable(this))
+				{
+					this.SetFocusedElement(
+						this,
+						FocusState.Programmatic,
+						animateIfBringIntoView: false);
+					return;
+				}
+
 				// Set the focus on the first focusable control
 				var spFirstFocusableElementCDO = focusManager?.GetFirstFocusableElement(this);
 
@@ -36,6 +49,8 @@ private protected override void OnLoaded()
 					focusManager.InitialFocus = true;
 
 					TrySetFocusedElement(spFirstFocusableElementDO);
+
+					focusManager.InitialFocus = false;
 				}
 
 				if (spFirstFocusableElementCDO == null)

src/Uno.UI/UI/Xaml/Input/FocusManager.Android.cs

@@ -8,6 +8,7 @@
 using Windows.UI.Xaml.Controls;
 using Android.Graphics;
 using Windows.UI.ViewManagement;
+using Uno.UI.Xaml.Core;
 
 namespace Windows.UI.Xaml.Input
 {
@@ -18,7 +19,13 @@ private static void FocusNative(UIElement element)
 			// TODO Uno: Handle Hyperlink focus
 			if (element is Control control)
 			{
-				control.RequestFocus();
+				var focusManager = VisualTree.GetFocusManagerForElement(control);
+				if (element is Android.Views.View androidView &&
+					androidView.Focusable &&
+					focusManager?.InitialFocus == false) // Do not focus natively on initial focus so the soft keyboard is not opened
+				{
+					control.RequestFocus();
+				}
 
 				// Forcefully try to bring the control into view when keyboard is open to accommodate adjust nothing mode
 				if (InputPane.GetForCurrentView().Visible)

src/Uno.UI/UI/Xaml/Input/FocusManager.iOS.cs

@@ -5,11 +5,21 @@
 using UIKit;
 using Uno.UI.Extensions;
 using Windows.UI.Xaml.Controls;
+using Windows.UI.ViewManagement;
+using Uno.UI.Xaml.Core;
 
 namespace Windows.UI.Xaml.Input
 {
 	public partial class FocusManager
-	{		
-		private static void FocusNative(UIElement control) => control?.BecomeFirstResponder();
+	{
+		private static void FocusNative(UIElement control)
+		{
+			var focusManager = VisualTree.GetFocusManagerForElement(control);
+			if (control?.CanBecomeFirstResponder == true &&
+				focusManager?.InitialFocus == false)  // Do not focus natively on initial focus so the soft keyboard is not opened
+			{
+				control.BecomeFirstResponder();
+			}
+		}
 	}
 }

src/Uno.UI/UI/Xaml/Input/FocusManager.macOS.cs

@@ -10,6 +10,12 @@ namespace Windows.UI.Xaml.Input
 {
 	public partial class FocusManager
 	{
-		private static void FocusNative(UIElement control) => control?.BecomeFirstResponder();
+		private static void FocusNative(UIElement control)
+		{
+			if (control?.AcceptsFirstResponder() == true)
+			{
+				Window.Current?.NativeWindow?.MakeFirstResponder(control);
+			}
+		}
 	}
 }

src/Uno.UI/UI/Xaml/Input/FocusManager.wasm.cs

@@ -82,6 +82,14 @@ internal static bool FocusNative(UIElement element)
 				return false;
 			}
 
+			var focusManager = VisualTree.GetFocusManagerForElement(element);
+
+			if (focusManager?.InitialFocus == true)
+			{
+				 // Do not focus natively on initial focus so the soft keyboard is not opened
+				return false;
+			}
+
 			if (element is TextBox textBox)
 			{
 				return textBox.FocusTextView();

src/Uno.UI/UI/Xaml/Window.macOS.cs

@@ -1,18 +1,18 @@
-using CoreGraphics;
-using Foundation;
 using System;
+using System.Drawing;
 using System.Linq;
 using System.Runtime.InteropServices;
 using AppKit;
+using CoreGraphics;
+using Foundation;
+using Uno.UI;
+using Uno.UI.Controls;
+using Uno.UI.Xaml.Core;
 using Windows.Foundation;
 using Windows.Foundation.Metadata;
 using Windows.UI.Core;
-using Uno.UI.Controls;
-using System.Drawing;
 using Windows.UI.ViewManagement;
-using Uno.UI;
 using Windows.UI.Xaml.Controls;
-using Uno.UI.Xaml.Core;
 
 namespace Windows.UI.Xaml
 {
@@ -62,6 +62,8 @@ public Window()
 			InitializeCommon();
 		}
 
+		internal NSWindow NativeWindow => _window;
+
 		private void ObserveOrientationAndSize()
 		{
 			_windowResizeNotificationObject = NSNotificationCenter.DefaultCenter.AddObserver(