How to make the background of the CommandBar transparent?

Question

Does anyone know how to make the background of the CommandBar transparent when its overflow is open?

I already tried adding the background directly and through code, but it doesn't change its style. <CommandBar Grid.Row="2" Background="Transparent"

This way, the background becomes transparent, but the rest of the styles get distorted.

If I place BasedOn="{StaticResource DefaultCommandBarStyle}" it stops working.

<Style x:Key="CustomCommandBarStyle" TargetType="CommandBar" BasedOn="{StaticResource DefaultCommandBarStyle}">
    <Setter Property="Background" Value="Transparent"/>
</Style>

It is an application in WinUI3.

I wish to obtain the following design.

Answer 1

This won't bring the default settings of the default style:

<Style x:Key="CustomCommandBarStyle" TargetType="CommandBar">
    <Setter Property="Background" Value="Transparent"/>
</Style>

This brings the default style settings but doesn't work because the Background will be set by the default visual states:

<Style x:Key="CustomCommandBarStyle" TargetType="CommandBar" BasedOn="{StaticResource DefaultCommandBarStyle}">
    <Setter Property="Background" Value="Transparent"/>
</Style>

This works because is overriding the SolidColorBrush that will be used by the VisualState:

<Page.Resources>
    <SolidColorBrush x:Key="CommandBarBackgroundOpen"
        Color="Transparent" />
</Page.Resources>

You can learn more about this on the generic.xaml file.