Associative Array In WP with wp_list_pages()

$theParent = wp_get_post_parent_id(get_the_ID());

if ($theParent) {
    $findChildrenOf = $theParent;
} else {
    $findChildrenOf = get_the_ID();
}
wp_list_pages(array(
    'title_li' => NULL,
    'child_of' => $findChildrenOf,
));

            //return pages in memory
            $testArray = get_pages(array(
                'child_of' => get_the_ID()
            ));
            
            if($theParent or $testArray) { ?>
            <div class="page-links">
                <h2 class="page-links__title"><a href="<?php echo get_permalink($theParent); ?>"><?php echo get_the_title($theParent); ?></a></h2>
                <ul class="min-list">
                <?php  
                    if ($theParent) {
                        $findChildrenOf = $theParent;
                    } else {
                        $findChildrenOf = get_the_ID();
                    }
                    //echo pages
                    wp_list_pages(array(
                        'title_li' => NULL,
                        'child_of' => $findChildrenOf,
                    ));
                ?>
                </ul>
            </div>
            <?php } ?>