List courses in WooCommerce product w.r.t their menu order score

wplms_customizer.php

add_filter('wplms_product_course_order_filter','wplms_course_in_product_order_filter');

function wplms_course_in_product_order_filter($courses){
    if(!empty($courses)){
        foreach($courses as $course){
            $order = get_post_field('menu_order',$course);
            
            if(empty($order))
                $order = 0;

            if(!empty($new_courses[$order])){
                $order = wplms_course_product_recursive_check($new_courses,$order);
                $new_courses[$order] = $course;
            }
            $new_courses[$order] = $course;
        }
        ksort($new_courses);
        print_r($new_courses);
        return $new_courses;
    }
    return $courses;
}

function wplms_course_product_recursive_check($array,$order){
    if(empty($array[$order])){
        return $order;
    }else{
        $order++;
        wplms_course_product_recursive_check($array,$order);
    }
}