wordpress CMB2 get field type

Question

I'm using CMB2 and I need to get the field type for each field

My Backend Code

protected function attach_fields_to_post($fields) {
    $options = new_cmb2_box( array(
        'id'            => $this->plugin_name .'_post_custom_fields',
        'title'         => __('Post Custom Fields'),
        'object_types' => array( 'post' ),
        'show_on' => ['id' => $_GET['post']]
    ) );

    if(!empty($fields)) {
        $optionsTypes = ['multicheck', 'radio', 'select'];
        foreach ($fields as $field) {
            $type = $field[$this->plugin_name . '_Field_Type'];
            $name = $field[$this->plugin_name . '_Field_Name'];
            $optionFields = [
                'id' => $this->prefix . str_replace(' ', '_', $name),
                'type' => $type,
                'name' => $name,
            ];
            $options->add_field($optionFields);
        }
    }
}

On Frontend, I need to check the field type

Something like that

$fields = get_post_meta($post_id);
        
        foreach ($fields as $field) {
            if($field['type'] == 'select') {
                // Do something
            }

            if($field['type'] == 'text') {
                // Do something else
            }
        }