Bulk update nodes to enable automatic URL alias generation

my_module.install

<?php

function mymodule_update_9001(&$sandbox) {
  // Initialize variables on the first run.
  if (!isset($sandbox['total'])) {
    $entity_list = \Drupal::entityQuery('node')
      ->condition('type', 'my_entity')
      ->execute();
    $langcodes = \Drupal::languageManager()->getLanguages();
    $sandbox['langcodes'] = array_keys($langcodes);
    $sandbox['total'] = count($entity_list);
    $sandbox['current'] = 0;
  }

  // Batch cycle.
  $batch_nids = \Drupal::entityQuery('node')
    ->condition('type', 'my_entity')
    ->range($sandbox['current'], 15)
    ->execute();

  foreach ($batch_nids as $nid) {
    $my_entity = \Drupal::entityTypeManager()->getStorage('node')->load($nid);
    // Loop through all languages.
    foreach ($sandbox['langcodes'] as $langcode) {
      if ($my_entity->hasTranslation($langcode)) {
        $my_entity_translation = $my_entity->getTranslation($langcode);
        // Avoid re-saving nodes that don't need to be updated.
        if ($my_entity_translation->path->pathauto !== 1) {
          $my_entity_translation->path->pathauto = 1;
          $my_entity_translation->save();
        }
      }
    }
    $sandbox['current']++;
  }


  if ($sandbox['current'] >= $sandbox['total']) {
    $sandbox['#finished'] = 1;
    \Drupal::messenger()->addMessage('A total of ' . $sandbox['total'] . ' entities were updated.');

  }
  else {
    $sandbox['#finished'] = ($sandbox['current'] / $sandbox['total']);
    // Output a message to inform about the ongoing process.
    \Drupal::messenger()->addMessage($sandbox['current'] . ' entities were updated out of ' . $sandbox['total']);
  }
}