how can I add custom button on PlaybackControls in vision os like apple tv

I'm testing code with destination sample app but I really don't know how to add button beside of title in playbackcontrols. I can add button with customoverlay and customInfoViewControllers but it is not like apple tv's seat change button . how can I add button ?

how can I add custom button on PlaybackControls in vision os like apple tv
 
 
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