Segment's first paragraph reads:
AuthenticationMethods
    ... This option must be followed by one or more __comma-separated lists__ of authentication method names. ...

Suggested change
    ... This option must be followed by one or more lists of __comma-separated authentication method names__. ...

Rationale:
The current wording is misleading; not the lists are comma-separated, but their elements; any pair of neighbouring lists is space-separated.
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My approach was:
Taking the example of the second paragraph's first sentence (without considering the subsequent explanation)
    ... âpublickey,password publickey,keyboard-interactiveâ ...
the misleading statement about the list separator would have to yield three authentication paths, either with:
   "publickey" or "password and publickey" or  "keyboard-interactive"
Testing a configuration with just "password,publickey" in an actual sshd_config file made it apparent that a single list is at hand, as an authentication only occurs if the password input can be augmented with the retrieval of a keyfile (otherwise, the client reports "Authenticated with partial success.").
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And something else is at play:
    AuthenticationMethods password publickey
    AuthenticationMethods publickey password

Both fail to authenticate, if no publickey is present; apparently, the first (and only) items of the 2 lists are brought into a default order of "publickey password"; this cannot be inferred from invoking
    sshd -T -f /etc/ssh/sshd_config
which seems to suggest that the order remains as originally set in sshd_config.
Granted, single item lists do not warrant usage of "AuthenticationMethods". But this fails as well:
    AuthenticationMethods password publickey,password
(Again, a rather useless combination from a practical view)
The client specifically stating not to use public key auth remedies the issue:
    ssh user@host -o "PubkeyAuthentication no"
My suggestion for this would be to extend the manual section by a sentence that states the order of precedence of authentication methods within a given "stage".
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For me, with regard to the manual segment of AuthenticationMethods, a question remains with the term "stage" in paragraph 2, sentence 2:
    Only methods that are next in one or more lists are offered at each stage, ...
Is this supposed to say that, for example:
    AuthenticationMethods password,publickey  hostbased,keyboard-interactive
could result in a user being authenticated by "hostbased publickey"?

If so, then the last sentence of the section's paragraph 1:
    Successful authentication requires completion of every method in at least one of these lists.
would be incorrect in so far that - strictly speaking - none of the given lists was completed, but a new one was assembled.

Thanks for any clarifications -  and maybe, this helps some other folks when preparing and testing an sshd configuration.
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Beyond this topic, is there a reason why only the first occurrence of AuthenticationMethods is honored? As with HostKey, Port, ..., reocurring keywords' values could be appended...