Material.System (or Universal.System) isn't working

[Material]
Primary=#41cd52
Accent=#41cd52
Theme=System

[Universal]
Accent=#41cd52
Theme=System

RadioButton {
    text: qsTr("Light")
    checked: appSettings.theme === "Light"
    ButtonGroup.group: modeBG
    onClicked: {
        appSettings.theme = "Light"
    }
}
RadioButton {
    text: qsTr("Dark")
    checked: appSettings.theme === "Dark"
    ButtonGroup.group: modeBG
    onClicked: {
        appSettings.theme = "Dark"
    }
}
RadioButton {
    text: qsTr("System theme")
    ButtonGroup.group: modeBG
    onClicked: {
        if (appSettings.style === "Material") {
            appSettings.theme = "Material.System"
        } else {
            appSettings.theme = "Universal.System"
        }
        console.log(Material.theme)
    }
}