gallery_2_galleryInFlexibleLayout.php

<?php
function gallery_2_galleryInFlexibleLayout(){
    $arr = [
        'post_type' => 'cp_resident',
        'posts_per_page' => -1,
        'fields' => 'ids'
    ];
    $q = new WP_Query($arr);
    
    foreach ($q->posts as $id) {
        echo $id.'<br>';
        // $values_to_migrate = get_field('field_595236f18886e', $id, false); // video
        $values_to_migrate = get_field('field_5f47af2dbeea9', $id, false); // gallery
        add_row(
		    'field_57b60b2f25458', [ // flexible
		    'acf_fc_layout'       => 'galleryBlock',
		    'field_57b6f951e9817' => $values_to_migrate, //images/gallery
		], $id);
        
        var_dump($values_to_migrate);
        echo '<br>';
        
    }
}