for a CPT change "manage_posts_columns" and "manage_posts_custom_column" to use custom post type name instead of "posts"

Add post ID to dashboard

/* ===== START ADD POST ID TO ADMIN ===== */
function posts_columns_id($defaults){
$defaults['wps_post_id'] = __('ID');
return $defaults;
}// end posts_columns_id function
function posts_custom_id_columns($column_name, $id){
if($column_name === 'wps_post_id'){
echo $id;
}
}// end posts_custom_id_columns function

add_filter('manage_posts_columns', 'posts_columns_id', 5);
add_action('manage_posts_custom_column', 'posts_custom_id_columns', 5, 2);
add_filter('manage_pages_columns', 'posts_columns_id', 5);
add_action('manage_pages_custom_column', 'posts_custom_id_columns', 5, 2);
/* ===== END ADD POST ID TO ADMIN ===== */