[
    'bootstrap' => ['importer'],
    'controllerMap' => [
        'importer' => [
            'class' => 'backend\commands\ImporterController',
        ],
    ],
    'modules' => [
        'importer' => [
            'class' => 'webtoolsnz\importer\Module',
        ],
    ],
]

config/web.php

[
    'bootstrap' => ['importer'],
    'modules' => [
        'importer' => [
            'class' => 'webtoolsnz\importer\Module',
        ],
    ],
]

controllers/ImportController.php

<?php
class ImportController extends \webtoolsnz\importer\ImporterController
{
    
}

cp vendor/webtoolsnz/yii2-importer/src/migrations/* migrations/ ./yii migrate