function pw_bulk_edit_custom_columns( $columns ) {
    $columns[] = array(
        'name' => 'en précommande',
        'type' => 'text',
        'table' => 'meta',
        'field' => '_simple_preorder',
        'visibility' => 'both',
        'readonly' => false,
        'sortable' => 'false'
    );

    $columns[] = array(
        'name' => 'info délais',
        'type' => 'text',
        'table' => 'meta',
        'field' => '_wpro_no_date_label',
        'visibility' => 'both',
        'readonly' => false,
        'sortable' => 'false'
    );

$columns[] = array(
        'name' => 'variation en précommande',
        'type' => 'text',
        'table' => 'meta',
        'field' => '_wpro_variable_is_preorder',
        'visibility' => 'both',
        'readonly' => false,
        'sortable' => 'false'
    );

$columns[] = array(
        'name' => 'variation info délais',
        'type' => 'text',
        'table' => 'meta',
        'field' => '_wpro_no_date_label_variable',
        'visibility' => 'both',
        'readonly' => false,
        'sortable' => 'false'
    );


    return $columns;
}
add_filter( 'pwbe_product_columns', 'pw_bulk_edit_custom_columns' );