If it's sent in clear text, with verbose commands and x offsets you should be able to see the packets. I've been able to grab ldap credentials on 389 like that. Not sure about radius. You have a whole other set of troubleshooting commands with auth, like below:
test authentication authentication-profile "CorpLDAP" username user password
Then you have to follow the authd.log:
tail follow yes mp-log authd.log
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