Hook up BringIntoViewOnFocusChange in templates.

src/Avalonia.Themes.Fluent/Controls/ListBox.xaml

@@ -36,7 +36,8 @@
                         VerticalScrollBarVisibility="{TemplateBinding (ScrollViewer.VerticalScrollBarVisibility)}"
                         IsScrollChainingEnabled="{TemplateBinding (ScrollViewer.IsScrollChainingEnabled)}"
                         IsScrollInertiaEnabled="{TemplateBinding (ScrollViewer.IsScrollInertiaEnabled)}"
-                        AllowAutoHide="{TemplateBinding (ScrollViewer.AllowAutoHide)}">
+                        AllowAutoHide="{TemplateBinding (ScrollViewer.AllowAutoHide)}"
+                        BringIntoViewOnFocusChange="{TemplateBinding (ScrollViewer.BringIntoViewOnFocusChange)}">
             <ItemsPresenter Name="PART_ItemsPresenter"
                             AreVerticalSnapPointsRegular="{TemplateBinding AreVerticalSnapPointsRegular}"
                             AreHorizontalSnapPointsRegular="{TemplateBinding AreHorizontalSnapPointsRegular}"

src/Avalonia.Themes.Fluent/Controls/TextBox.xaml

@@ -136,7 +136,8 @@
                   <ScrollViewer HorizontalScrollBarVisibility="{TemplateBinding (ScrollViewer.HorizontalScrollBarVisibility)}"
                                 VerticalScrollBarVisibility="{TemplateBinding (ScrollViewer.VerticalScrollBarVisibility)}"
                                 IsScrollChainingEnabled="{TemplateBinding (ScrollViewer.IsScrollChainingEnabled)}"
-                                AllowAutoHide="{TemplateBinding (ScrollViewer.AllowAutoHide)}">
+                                AllowAutoHide="{TemplateBinding (ScrollViewer.AllowAutoHide)}"
+                                BringIntoViewOnFocusChange="{TemplateBinding (ScrollViewer.BringIntoViewOnFocusChange)}">
                     <Panel>
                       <TextBlock Name="PART_Watermark"
                               Opacity="0.5"

src/Avalonia.Themes.Fluent/Controls/TreeView.xaml

@@ -30,7 +30,8 @@
                         HorizontalScrollBarVisibility="{TemplateBinding (ScrollViewer.HorizontalScrollBarVisibility)}"
                         VerticalScrollBarVisibility="{TemplateBinding (ScrollViewer.VerticalScrollBarVisibility)}"
                         IsScrollChainingEnabled="{TemplateBinding (ScrollViewer.IsScrollChainingEnabled)}"
-                        AllowAutoHide="{TemplateBinding (ScrollViewer.AllowAutoHide)}">
+                        AllowAutoHide="{TemplateBinding (ScrollViewer.AllowAutoHide)}"
+                        BringIntoViewOnFocusChange="{TemplateBinding (ScrollViewer.BringIntoViewOnFocusChange)}">
             <ItemsPresenter Name="PART_ItemsPresenter"
                             ItemsPanel="{TemplateBinding ItemsPanel}"
                             Margin="{TemplateBinding Padding}" />

src/Avalonia.Themes.Simple/Controls/ListBox.xaml

@@ -17,6 +17,7 @@
                 CornerRadius="{TemplateBinding CornerRadius}">
           <ScrollViewer Name="PART_ScrollViewer"
                         AllowAutoHide="{TemplateBinding (ScrollViewer.AllowAutoHide)}"
+                        BringIntoViewOnFocusChange="{TemplateBinding (ScrollViewer.BringIntoViewOnFocusChange)}"
                         Background="{TemplateBinding Background}"
                         HorizontalScrollBarVisibility="{TemplateBinding (ScrollViewer.HorizontalScrollBarVisibility)}"
                         IsScrollChainingEnabled="{TemplateBinding (ScrollViewer.IsScrollChainingEnabled)}"

src/Avalonia.Themes.Simple/Controls/TextBox.xaml

@@ -126,6 +126,7 @@
                 <ScrollViewer Grid.Column="1"
                               Grid.ColumnSpan="1"
                               AllowAutoHide="{TemplateBinding (ScrollViewer.AllowAutoHide)}"
+                              BringIntoViewOnFocusChange="{TemplateBinding (ScrollViewer.BringIntoViewOnFocusChange)}"
                               HorizontalScrollBarVisibility="{TemplateBinding (ScrollViewer.HorizontalScrollBarVisibility)}"
                               IsScrollChainingEnabled="{TemplateBinding (ScrollViewer.IsScrollChainingEnabled)}"
                               VerticalScrollBarVisibility="{TemplateBinding (ScrollViewer.VerticalScrollBarVisibility)}">

src/Avalonia.Themes.Simple/Controls/TreeView.xaml

@@ -15,6 +15,7 @@
                 BorderThickness="{TemplateBinding BorderThickness}"
                 CornerRadius="{TemplateBinding CornerRadius}">
           <ScrollViewer AllowAutoHide="{TemplateBinding (ScrollViewer.AllowAutoHide)}"
+                        BringIntoViewOnFocusChange="{TemplateBinding (ScrollViewer.BringIntoViewOnFocusChange)}"
                         Background="{TemplateBinding Background}"
                         HorizontalScrollBarVisibility="{TemplateBinding (ScrollViewer.HorizontalScrollBarVisibility)}"
                         IsScrollChainingEnabled="{TemplateBinding (ScrollViewer.IsScrollChainingEnabled)}"