Hi, in RealityKit, AudioPlaybackController exposes duration, gain, speed, play/pause/stop, and a completion handler, but I can't find a way to read the current playhead position while a resource is playing. I need this to trigger animations and other timed events in sync with the audio. Is there a supported way to read the current playback position on AudioPlaybackController? If not, is this planned any time soon? Also, is there a sample-accurate way to start/keep audio playback in sync across multiple entities in RealityKit? Appreciate any guidance, thanks.