Brilliant! Glad you got it sorted 😁👍Update: I talked to Apple support and we decided to reset all of my settings. That did it!
So, I have no idea which setting specifically was doing this, but I'm now getting MQA through this setup. Hope this helps someone else in the future. I'll try to remember to update this thread if I figure out which setting it is.
Thanks, all (especially Tinman1952).