Wordpress ACF：使用子字段转发器日期查询

I want to perform a search in my wordpress site where I have a custom post (cp_course) with some custom fields (course_code, course_iteration). Course_iteration custom field is a Repeater containing these date sub_fields: course_iteration_start and course_iteration_start.

So this is what I have tried so far:

// filter
function my_posts_where( $where ) {

    $where = str_replace("meta_key = 'course_iterations_%", "meta_key LIKE 'course_iterations_%", $where);

    return $where;
}

add_filter('posts_where', 'my_posts_where');




$args = array(
        'post_type'  => 'cp_course', 'numberposts' =>-1,'orderby' => 'ID', 'order' => 'ASC', 's' => $searchterm,
        'meta_query' => 
            array(
                'relation' => 'AND',
                array(
                    'key'   => 'course_code',
                    'value' => $code,
                ),
                array(
                    'key' => 'course_duration',
                    'value' => $duration,
                ),  
                array(
                    'key'   => 'course_iterations_%_course_iteration_start',
                    'compare' => 'between',
                    'type' => 'numeric',
                    'value' => array($date_from, $date_to),

                )
            )

    );


$course = get_posts($args);


<div class="page_title">
    <h3>Courses</h3>
</div>
<?php foreach ($course as $post):setup_postdata($post);?>
<a href="#"><?php the_title();?></a>

<?php endforeach;wp_reset_postdata();?>

But with no luck. Can anyone guide me on how to solve this? I've spent so many days on it without managing to get it to work and its so frustrating. If it's not easy is there a plugin that can achieve that?

ACF custom fields are not exposed, as far as I am aware, in default wp_queries, you might have a look at this in order to achieve what you need: https://wordpress.org/plugins/acf-to-rest-api/