So far this is a list of clients that work with nip 42 auth in my testing:

ones ive tested and it worked

amethyst

garnet

0xChat

Coracle

Ones others say have worked:

Damus

Nostur

Ones that did not work in my testing:

Iris

nostrudel

freerse

im gonna keep testing, if anyone has any to add , reply 🤙

#nostr