ListView highlight should support rendering between "layers" of a delegate

import QtQuick 2.14

ListView {
    width: 400
    height: 400
    spacing: 2
    model: 10
    delegate: Item {
        width: parent.width
        height: 50

        // background
        Rectangle {
            anchors.fill: parent
            color: "steelblue"
        }

        // foreground
        Text {
            anchors.centerIn: parent
            color: "white"
            text: "Item " + model.index
        }

        TapHandler { onTapped: currentIndex = model.index }
    }

    // this highlight should appear over the delegate background, but under the delegate foreground
    highlight: Rectangle {
        color: "#80FF0000"
        z: 2
    }
}

Item {
    width: 400
    height: 400
    
    Rectangle {
        RenderLayer.target: "foregroundLayer"
    }
    
    Rectangle {
        RenderLayer.target: "backgroundLayer"
    }

    RenderLayer { name: "backgroundLayer" }
    RenderLayer { name: "foregroundLayer" }
}