chaining AUTH methods -- adding GoogleAuthenticator 2nd Factor to pubkey auth? can't get the GA prompt :-/

[Dmt Ops]

I added an EXPLICIT

    AuthenticationMethods  publickey,keyboard-interactive
+    UsePam yes

to sshd_config.  Now, at connect attempt I get

Password:
Verification code:
Password:
Verification code:
Password:
...

I.e.,

It's asking for Password, not accepting pubkey

AND

when given the password (which is correct), and the GA VerificationCode, it
simply repeats the credentials request.