sshd AuthenticationMethods to enforce Public Key, Password, and 2FA

Question

I'm following this DO guide on setting up 2FA on your server. It all makes sense until step 3 and 4.

• Step 3 says to let sshd know about 2FA by editing /etc/ssh/sshd_config and to add AuthenticationMethods publickey,password publickey,keyboard-interactive.
• Step 4 (optional) says to require a password AND 2FA by editing /etc/pam.d/sshd and enableing @include common-auth

My end goal is that I would like to require a pubkey + user password + 2FA when logging into a server. But step 3 makes it sound like the password would be optional. Is AuthenticationMethods unrelated to @include common-auth when it comes to requiring a user password during server login? If so, what does AuthenticationMethods password refer to?