This way one can just add a KCM as-is without having to worry about a potentially diverging translation or icon from System Settings.

Placed the following in plasma-pa's config.qml

ConfigCategory {
    pluginName: "kcms/kcm_pulseaudio"
}

Even though I didn't specify an icon or name, it showed up.

It seems weird that I have to add "kcms/" prefix to it in contrast to X-Plasma-ConfigPlugins though, and I also didn't find anyone actually using pluginName. Also lacks a KIOSK check because of the kcms/ prefix.

Maybe we should support both? We can't change force it, though, as it will be a behavior change.