using terminal it seems everything is okay. previously I was using iTerm2, which doesn't show any Audio Units by third parties
I just realized that a problem with a command-line utility I'm writing (which list AUs) has this same problem. And I can confirm that I have the same issue with "auval -a". (Except "auval -32 -a" does show 3rd-party AUs in iTerm, which makes no sense to me.).
Here's my stackoverflow post regarding this:
I guess I will see if I can get an answer from the folks at iTerm.