diff --git a/maui/src/Accordion/AccordionItemView.cs b/maui/src/Accordion/AccordionItemView.cs
index a765132d..e2938f84 100644
--- a/maui/src/Accordion/AccordionItemView.cs
+++ b/maui/src/Accordion/AccordionItemView.cs
@@ -71,9 +71,21 @@ internal bool CanCollapseItemOnSingleAndMultipleExpandMode()
 				return false;
 			}
 
-			var expandedItems = Accordion.Items.Where(x => x._accordionItemView != null && x._accordionItemView.IsExpanded).ToList();
+			var expandedCount = 0;
+			foreach (var item in Accordion.Items)
+			{
+				if (item._accordionItemView != null && item._accordionItemView.IsExpanded)
+				{
+					expandedCount++;
+					if (expandedCount > 1)
+					{
+						break;
+					}
+				}
+			}
+
 			return (Accordion.ExpandMode == AccordionExpandMode.Single ||
-					Accordion.ExpandMode == AccordionExpandMode.Multiple) && expandedItems.Count == 1;	
+					Accordion.ExpandMode == AccordionExpandMode.Multiple) && expandedCount == 1;	
         }
 
 		#endregion
diff --git a/maui/src/Accordion/SfAccordion.cs b/maui/src/Accordion/SfAccordion.cs
index b45412e1..2816817c 100644
--- a/maui/src/Accordion/SfAccordion.cs
+++ b/maui/src/Accordion/SfAccordion.cs
@@ -540,8 +540,22 @@ internal void UpdateIsExpandValueBasedOnIndex(int index, bool isExpanded)
 		/// </summary>
 		internal void UpdateSelection()
 		{
-			var selectedItems = Items.Where(x => x._accordionItemView != null && x._accordionItemView.IsSelected).ToList();
-			if (selectedItems.Count == 1 && Items[selectedItems[0]._itemIndex] is AccordionItem items && items._accordionItemView is AccordionItemView accordionItem)
+			AccordionItem? selectedItem = null;
+			int selectedCount = 0;
+			foreach (var item in Items)
+			{
+				if (item._accordionItemView != null && item._accordionItemView.IsSelected)
+				{
+					selectedItem ??= item;
+					selectedCount++;
+					if (selectedCount > 1)
+					{
+						break;
+					}
+				}
+			}
+
+			if (selectedCount == 1 && selectedItem != null && Items[selectedItem._itemIndex] is AccordionItem accordionItemEntry && accordionItemEntry._accordionItemView is AccordionItemView accordionItem)
 			{
 				accordionItem.IsSelected = false;
 			}
@@ -560,7 +574,15 @@ internal void UpdateAccordionItemsBasedOnExpandModes(bool isExpandModeChanged)
 				return;
 			}
 
-			var expandedItems = Items.Where(x => x._accordionItemView != null && x._accordionItemView.IsExpanded).ToList();
+			var expandedItems = new List<AccordionItem>();
+			foreach (var item in Items)
+			{
+				if (item._accordionItemView != null && item._accordionItemView.IsExpanded)
+				{
+					expandedItems.Add(item);
+				}
+			}
+
 			switch (ExpandMode)
 			{
 				case AccordionExpandMode.Single:
@@ -1575,7 +1597,15 @@ void IKeyboardListener.OnPreviewKeyDown(Syncfusion.Maui.Toolkit.Internals.KeyEve
 		/// <param name="e">The <see cref="KeyEventArgs"/> containing the event data for the key that was pressed.</param>
 		void IKeyboardListener.OnKeyDown(KeyEventArgs e)
 		{
-			var selectedItem = Items.FirstOrDefault(x => x._accordionItemView != null && x._accordionItemView.IsSelected);
+			AccordionItem? selectedItem = null;
+			foreach (var item in Items)
+			{
+				if (item._accordionItemView != null && item._accordionItemView.IsSelected)
+				{
+					selectedItem = item;
+					break;
+				}
+			}
 			if (e.Key == KeyboardKey.Down || (e.Key == KeyboardKey.Tab && !e.IsShiftKeyPressed))
 			{
 				OnDownKeyPressed(selectedItem);
diff --git a/maui/tests/Syncfusion.Maui.Toolkit.UnitTest/Layout/SfAccordionUnitTests.cs b/maui/tests/Syncfusion.Maui.Toolkit.UnitTest/Layout/SfAccordionUnitTests.cs
index 07c37744..8b86fb60 100644
--- a/maui/tests/Syncfusion.Maui.Toolkit.UnitTest/Layout/SfAccordionUnitTests.cs
+++ b/maui/tests/Syncfusion.Maui.Toolkit.UnitTest/Layout/SfAccordionUnitTests.cs
@@ -1605,7 +1605,61 @@ public void UpdateSelection_ShouldDeselectItem_WhenSingleItemIsSelected()
 			InvokePrivateMethod(accordion, "UpdateSelection");
 			Assert.False(accordion.Items[0]._accordionItemView?.IsSelected);
 		}
-		
+
+		[Fact]
+		public void UpdateSelection_ShouldNotDeselect_WhenNoItemsAreSelected()
+		{
+			var accordion = new SfAccordion();
+			accordion.Items.Add(new AccordionItem { _itemIndex = 0, _accordionItemView = new AccordionItemView() });
+			accordion.Items.Add(new AccordionItem { _itemIndex = 1, _accordionItemView = new AccordionItemView() });
+			accordion.UpdateSelection();
+			// No exception thrown, items remain unselected
+			Assert.False(accordion.Items[0]._accordionItemView!.IsSelected);
+			Assert.False(accordion.Items[1]._accordionItemView!.IsSelected);
+		}
+
+		[Fact]
+		public void UpdateSelection_ShouldNotThrow_WhenItemsHaveNullAccordionItemView()
+		{
+			var accordion = new SfAccordion();
+			accordion.Items.Add(new AccordionItem { _itemIndex = 0 });
+			accordion.Items.Add(new AccordionItem { _itemIndex = 1 });
+			var exception = Record.Exception(() => accordion.UpdateSelection());
+			Assert.Null(exception);
+		}
+
+		[Fact]
+		public void UpdateAccordionItemsBasedOnExpandModes_SingleMode_CollapsesExtraItems_WhenMultipleExpanded()
+		{
+			var accordion = new SfAccordion
+			{
+				ExpandMode = AccordionExpandMode.Single
+			};
+			var item1 = new AccordionItem { _itemIndex = 0, _accordionItemView = new AccordionItemView { IsExpanded = true } };
+			var item2 = new AccordionItem { _itemIndex = 1, _accordionItemView = new AccordionItemView { IsExpanded = true } };
+			var item3 = new AccordionItem { _itemIndex = 2, _accordionItemView = new AccordionItemView { IsExpanded = true } };
+			accordion.Items.Add(item1);
+			accordion.Items.Add(item2);
+			accordion.Items.Add(item3);
+			accordion.IsViewLoaded = true;
+			accordion.UpdateAccordionItemsBasedOnExpandModes(false);
+			// After collapsing extras, items at indices 0 and 1 should be collapsed (IsExpanded set on AccordionItem)
+			Assert.False(item1.IsExpanded);
+			Assert.False(item2.IsExpanded);
+		}
+
+		[Fact]
+		public void UpdateAccordionItemsBasedOnExpandModes_EmptyItems_ShouldNotThrow()
+		{
+			var accordion = new SfAccordion
+			{
+				ExpandMode = AccordionExpandMode.Single
+			};
+			accordion.IsViewLoaded = true;
+			var exception = Record.Exception(() => accordion.UpdateAccordionItemsBasedOnExpandModes(false));
+			Assert.Null(exception);
+		}
+
 		#endregion
 
 	}