How to display stored values ​​in select2?

Question

Yii

I use plugins from Kartik DepDrop and Select2 In
the second select, I select several values ​​\u200b\u200bat once (multiple), I get an array Here is my form

<?php $form = ActiveForm::begin(['id' => 'games-form']);?>
            
  <?= $form->field($model, 'id')->label('')->dropDownList(ArrayHelper::map(Platforms::find()->all(), 'id', 'name'), ['id'=>'cat-id', 'prompt' => '- ' . Yii::t('main', 'Select platform') . ' -']) ?>

  <?= $form->field($model, 'game_id')->label('')->widget(DepDrop::classname(), [
            'type' => DepDrop::TYPE_SELECT2,
            'options' => ['multiple' => true],
            'pluginOptions'=>[
                'depends'=>['cat-id'],
                'placeholder'=>'- ' . Yii::t('main', 'Select games') . ' -',
                'url'=>Url::to(['/user/default/getgame'])
            ]
        ]) 
    
    ?>
    
    <?= Html::submitButton(Yii::t('main', 'Save'), ['class' => 'btn btn-primary'])?>

    <?php ActiveForm::end(); ?>