Window2.axaml

<Window xmlns="https://github.com/avaloniaui" 
        xmlns:oxy="http://oxyplot.org/avalonia"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        x:Class="MemoryTest.Window2"
        xmlns:local="clr-namespace:MemoryTest"
        x:DataType="local:Window2"
        MinWidth="500" MinHeight="300">
  <Grid>
    <ScrollViewer>
      <ItemsControl ItemsSource="{Binding .}">
        <ItemsControl.ItemsPanel>
          <ItemsPanelTemplate>
            <StackPanel Orientation="Vertical" />
          </ItemsPanelTemplate>
        </ItemsControl.ItemsPanel>
        <ItemsControl.ItemTemplate>
          <DataTemplate>
            <oxy:PlotView Model="{Binding}" Height="300" Width="500"/>
          </DataTemplate>
        </ItemsControl.ItemTemplate>
      </ItemsControl>
    </ScrollViewer>
  </Grid>
</Window>