Have you made a selection? The options are context sensitive, so models that require a selection do not show as an option. In fact it does exactly what you all seem to be describing.
Same happeing to me right after upgrading to V 27.6 everything except Firefly image 3 stopped showing up and I don’t even see the “Partner” link at all one mine.
I’m on MacBook Pro latest OS (Tahoe 26.3) Intel chip