[Android & iOS] Shadows & Gradients don't work with a list view's header/footer

[kubaflo]

Description

The following code doesn't work as expected, and like the collection view does:

<ListView
        VerticalOptions="Center"
        HeightRequest="300">
        <ListView.Header>
                <Label 
                        FontSize="16"
                        AutomationId="HeaderLabel"
                        HorizontalTextAlignment="Center"
                        Text="(Header) This is a border with shadows">
                        <Label.Background>
                                <LinearGradientBrush
                                        StartPoint="0, 0"
                                        EndPoint="1, 1">
                                        <LinearGradientBrush.GradientStops>
                                                <GradientStop Color="#8A2387"
                                                                Offset="0.1"/>
                                                <GradientStop Color="#E94057"
                                                                Offset="0.6"/>
                                                <GradientStop Color="#F27121"
                                                                Offset="1.0"/>
                                        </LinearGradientBrush.GradientStops>
                                </LinearGradientBrush>
                        </Label.Background>
                </Label>
        </ListView.Header>
        <ListView.Footer>
                <Label
                        FontSize="16"
                        HorizontalTextAlignment="Center"
                        Text="(Footer) This is a label with shadows">
                        <Label.Shadow>
                                <Shadow
                                        Brush="Green"
                                        Radius="4"
                                        Offset="0,4"/>
                        </Label.Shadow>
                </Label>
        </ListView.Footer>
</ListView>

Steps to Reproduce

No response

Link to public reproduction project repository

No response

Version with bug

9.0.21 SR2.1

Is this a regression from previous behavior?

Not sure, did not test other versions

Last version that worked well

Unknown/Other

Affected platforms

iOS, Android

Affected platform versions

No response

Did you find any workaround?

No response

Relevant log output