iTunes Match no longer works on Sonoma / iOS?

Thanks for your reply. Yes I found this article If songs are missing from your music library after you turn on Sync Library - Apple Support and found the songs are in “waiting” state. The root cause is the dreaded “unrecognized library” error, even after turning on/off “Sync Library” and rebooting the Mac.

I’ll open a new thread regarding the error, as I could not find a match when searching for the error string.

A fourth (or fifth) "Sync Library" bounce later and the songs finally show "Uploaded" status on the Mac, and appears on the iOS devices. I will chalk this up to a server glitch.