I'm also interested. More accurately, my employer is interested. As in other cases, new feature documentation is scarce, incomplete, and/or just not helpful. Does Apple not want third party devs using this functionality yet? If so, is it too much to ask of Apple to at least mention this in their docs so that we can properly adjust our expectations?

I've an app that hangs sometimes when AudioComponentInstanceDispose is called. The function just doesn't return and the system watchdog eventually shuts my app down. Though the crash reason may be different, that AudioComponentInstanceDispose hang time looks suspiciously similar. Only happens on iOS 15. Am not using Unity. A similar report is here: https://github.com/pjsip/pjproject/issues/2896