Admin View of Post Type - Add ACF field to column

functions.php

<?php
/* *** add fields from ACF to columns in admin view **** 
https://pluginrepublic.com/add-acf-fields-to-admin-columns/
CHANGE
- manage_model_posts_columns (replace "model" with post type slug)
- manage_model_posts_custom_column (replace "model" with post type slug)
- model_order (replace with ACF slug)
*/
 function add_acf_columns ( $columns ) {
   return array_merge ( $columns, array ( 
     'model_order' => __ ( 'Order' ),
   ) );
 }
 add_filter ( 'manage_model_posts_columns', 'add_acf_columns' );

 function model_custom_column ( $column, $post_id ) {
   switch ( $column ) {
     case 'model_order':
       echo get_post_meta ( $post_id, 'model_order', true );
       break;
   }
 }
 add_action ( 'manage_model_posts_custom_column', 'model_custom_column', 10, 2 );