wordpress acf repeater mapping in custom field post not working

Question

After a long search on the net, my code didn't come up with what I wanted. I with wordpress and acf , the purpose of the function is to return a mapped array from a costumed post type. I created and saved the costum post type named 'myCpt' to which I linked it with acf type fields: (text and repeater) I was able to retrieve the text value but I can't get the repeater values.... Thanks for seeing the var_dump() image

Your help will be very valuable to me.

class myClass
{
    function __construct()
    {
        var_dump($this->get_all());
    }

    function get_all()
    {
        $args = array(

            'post_type' => 'myCpt',
            'posts_per_page' => 999,
            'post_status' => 'publish'

        );

        $myCpt = get_posts($args);

        $myCpt_mapped = array_map(function ($myCpt) {

            $id = $myCpt->ID;

            return array(
                'id' => $id,
                'title' => get_field('maintitle', $id, false),
                'subtitle' => get_field('subtitle', $id, false),
                // 'services' =>  services repeater
                'repField' => array(
                    'name' => get_sub_field('name', $id, false),
                    'img' => get_sub_field('img', $id, false)
                )
            );
        }, $myCpt);

        return array(
            'myCpt' => $myCpt_mapped
        );
    }
}
global $myClass;
$myClass = new $myClass();}

resultat: var_dump()