WPF - Binding inside usercontrol content - wpf

Question

I'm new in WPF and I have problems encountered. Why the binding of ListView ItemSource inside the sectionControls:ViewDefaultLayout element is not working. But when I try to remove the ListView element outside of the sectionControls:ViewDefaultLayout element the categories are showing.
CategoriesControl.xaml
<UserControl x:Class="POS.Wpf.Controls.CategoriesControl"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:local="clr-namespace:POS.Wpf.Controls"
xmlns:sectionControls="clr-namespace:POS.Wpf.Controls.Section"
mc:Ignorable="d"
d:DesignHeight="450" d:DesignWidth="800"
Loaded="UserControl_Loaded"
x:Name="categoryUserControl">
<Grid>
<sectionControls:ViewDefaultLayout Title="Categories" Add="ViewDefaultLayout_Add" Delete="ViewDefaultLayout_Delete">
<ListView ItemsSource="{Binding DataContext.Categories}">
<ListView.View>
<GridView>
<GridViewColumn Header="Name" DisplayMemberBinding="{Binding Name}" />
</GridView>
</ListView.View>
</ListView>
</sectionControls:ViewDefaultLayout>
</Grid>
ViewDefaultLayout.xaml
<UserControl x:Class="POS.Wpf.Controls.Section.ViewDefaultLayout"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:local="clr-namespace:POS.Wpf.Controls.Section"
xmlns:materialDesign="http://materialdesigninxaml.net/winfx/xaml/themes"
mc:Ignorable="d"
d:DesignHeight="450" d:DesignWidth="800">
<UserControl.Template>
<ControlTemplate TargetType="UserControl">
<DockPanel>
<Grid DockPanel.Dock="Top">
<Label Content="{Binding Title}" Margin="10" Style="{StaticResource BoldLargeLabel}"></Label>
</Grid>
<Border Padding="10">
<DockPanel>
<Border BorderBrush="{x:Null}" DockPanel.Dock="Top" Margin="0 0 0 5">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="135" />
</Grid.ColumnDefinitions>
<Grid>
<TextBox Text="Search" VerticalAlignment="Stretch" HorizontalAlignment="Stretch" Foreground="#FFE4DFDF" VerticalContentAlignment="Center" FontSize="15"></TextBox>
<Button x:Name="SearchButton" Padding="5" Background="{x:Null}" BorderBrush="{x:Null}" HorizontalAlignment="Right" Click="SearchButton_Click">
<materialDesign:PackIcon Foreground="#A2A6AC" Kind="Search" Width="30" Height="30" />
</Button>
</Grid>
<StackPanel Grid.Column="1" Orientation="Horizontal" HorizontalAlignment="Right">
<Button x:Name="AddButton" Padding="5" Background="{x:Null}" HorizontalAlignment="Right" Margin="0 0 5 0" Click="AddButton_Click">
<materialDesign:PackIcon Foreground="#A2A6AC" Kind="Add" Width="50" Height="30" />
</Button>
<Button x:Name="DeleteButton" Padding="5" Background="{x:Null}" HorizontalAlignment="Right" Click="DeleteButton_Click">
<materialDesign:PackIcon Foreground="#A2A6AC" Kind="Delete" Width="50" Height="30" />
</Button>
</StackPanel>
</Grid>
</Border>
<ContentPresenter />
</DockPanel>
</Border>
</DockPanel>
</ControlTemplate>
</UserControl.Template>