I see the -resumeAllMediaPlayback: says the replacement method is -setAllMediaPlaybackSuspended:completionHandler:
I don't believe suspending and resuming media playback are matching actions, which would mean -resumeAllMediaPlayback: doesn't have a replacement API?
The deprecated -resumeAllMediaPlayback: method doesn't seem to work on Sonoma (pauseAllMediaPlaybackWithCompletionHandler: does work but resume does not).