Hmm, here to report this was working flawlessly for me on Xcode 14.3, probably couple dozen times, until just now it stopped working all of a sudden.

Another mystery is that for video frame CMSampleBuffers, they are always returning outputDuration as kCMTimeInvalid. Even in the Apple sample app AVMultiCam this is the case. So I can't calculate the trim values from the duration. The documentation says this should only return 'invalid' if there is an error, but I have no idea how to check for this error.

Yes this is currently/still broken for me on all my builds

I am on 11.0.1. I read the tips about changing the balance but didn't see an option for it. In my /Library/Audio/Plug-Ins/ folder all I had were 3 empty folders (which didn't seem like it would matter?) but I deleted them and restarted, then went back to Sound preferences and boom - balance slider showed up, and it was all the way to the right. So far so good (it seems fixed now)