Hosting Provider different-different way to manage phpMyAdmin. Some control panel provide direct open phpMyAdmin in there home page. DirectAdmin control panel some security reason you can not open home page. You can fallow bellow to open phpMyAdmin.
1. Sign in to DirectAdmin using your username & password control panel. You need to build your database already to use phpMyAdmin.
2. Go to “MySQL Management”
3. Click “phpMyAdmin”