Hi,
A simple and powerfull feature is to allow mysql/mariadb arbitrary server. It lets to work with docker databases without needed of an phpmyadmin own installation and saving the passwords keeping in a safe place. It allows too to access the phpadmin without open a external port of server. In a second version, it could allow to save databases backups from multiple databases in the aapanel.
If Is there a method of do it without a new feature, please post here.