Can’t find my wordpress DB in phpmyadmin

I don’t see any reason to login as root if you only need the one database… Have you tried logging in to phpMyAdmin as the user with the same credentials as your WordPress installation?

user: bn_wordpress
pass: 0cca6aaab5
port: 3306

We could avoid phpMyAdmin all together… From the command line you can dump the database using the following:

mysqldump -u [uname] -p[pass] db_name > db_backup.sql

A simpler *(more user-friendly/non-technical) being to dump the db via wp-admin using a backup/export plugin.

I’m partial to WP-Migrate DB for small dumps like this, but duplicator, all export pro, any of the WordPress backup/migration plugins can do the job of dumping your MySQL data for you.