I’ve solved my problem myself, thanks
function filter_priority_orders($query) {
global $pagenow;
$qv = $query->query_vars;
if ( $pagenow == 'edit.php' &&
isset($qv['post_status']) && $qv['post_status'] == 'wc-priority-order' &&
isset($qv['post_type']) && $qv['post_type'] == 'shop_order' )
{
$query->set('meta_key', '_priority_list');
$query->set('orderby', 'meta_value_num');
$query->set('order', 'ASC' );
}
return $query;
}
add_filter( 'pre_get_posts', 'filter_priority_orders' );