post_update batch

module_name.post_update.php

<?php

/**
 * Update existing nodes cp property to false.
 */
function uneo_pcf_cp_post_update_node_cp_prop(&$sandbox) {
  $entity_type_id = 'node';
  $id_name = 'nid';
  _update_entity_cp_property($sandbox, $entity_type_id, $id_name);
}

/**
 * Update existing taxonomy terms cp property to false.
 */
function uneo_pcf_cp_post_update_taxonomy_term_cp_prop(&$sandbox) {
  $entity_type_id = 'taxonomy_term';
  $id_name = 'tid';
  _update_entity_cp_property($sandbox, $entity_type_id, $id_name);
}

function _update_entity_cp_property(&$sandbox, $entity_type_id, $id_name) {
  $etm = \Drupal::entityTypeManager();
  $etm_storage = $etm->getStorage($entity_type_id);

  if (empty($sandbox)) {
    $query = $etm_storage->getQuery();
    $query->accessCheck(FALSE);
    $ids = $query->execute();

    $sandbox['progress'] = 0;
    $sandbox['current_id'] = 0;
    $sandbox['max'] = count($ids);
  }

  if (!$sandbox['max']) {
    $sandbox['#finished'] = 1;
    return;
  }

  $limit = 5;
  $query = $etm_storage->getQuery();
  $query->accessCheck(FALSE);
  $query->sort($id_name);
  $query->condition($id_name, $sandbox['current_id'], '>');
  $query->range(0, $limit);
  $ids = $query->execute();

  foreach ($ids AS $id) {
    $entity = $etm_storage->load($id);
    $value = $entity->get('cp')->getValue();
    if (isset($value[0]['value']) && $value[0]['value']) {
      $entity->get('cp')->setValue(FALSE);
      $entity->save();
    }

    $sandbox['results'][] = $entity->id();
    $sandbox['progress']++;
    $sandbox['current_id'] = $entity->id();
    $sandbox['message'] = $entity_type_id . ': ' . $entity->id();
  }
  //\Drupal::messenger()->addMessage('processed : ' . json_encode($ids));
  //\Drupal::logger('uneo_pcf_cp')->debug('Progress: ' . $sandbox['progress'] . ' items processed. ' . $entity_type_id);
  \Drupal::logger('uneo_pcf_cp')->debug('current batch chunk: ' . json_encode(array_values($ids)));

  $sandbox['#finished'] = ($sandbox['progress'] / $sandbox['max']); // 1

  // Print some progress.
  return t('@count items processed.', ['@count' => $sandbox['progress']]);
}