On a cPanel server you can see the list of all of Mailman's mailing lists by running this command:
ls -l /usr/local/cpanel/3rdparty/mailman/lists/
drwxrwsr-x. 2 mailman mailman 66 Apr 15 12:00 listtest_cptest.tld
drwxrwsr-x. 2 mailman mailman 66 Apr 15 12:00 mailman
As you can see above there are only two mailing lists here. Now if you want to see all the configuration options for one of these mailing lists you need to run the following command and replace the mailing list name with the name of the list that you wish to see: (The highlighted section)
/usr/local/cpanel/3rdparty/mailman/bin/config_list -o - listtest_cptest.tld | grep -Eiv "(^#.*|^$)"
This commands outputs all the configuration options for the "listtest_cptest.tld" mailing list onto the terminal.