Drupal 10+ hook - delete (or unpublish) comment with Cyrillic characters

mymodule.module

<?php

declare(strict_types=1);

use Drupal\Core\Entity\EntityInterface;
use Drupal\comment\CommentInterface;

/**
 * Implements hook_ENTITY_TYPE_insert().
 *
 * Hard-deletes comments that contain Cyrillic characters.
 * Logs the user ID instead of the comment ID.
 */
function my_module_comment_insert(EntityInterface $entity): void {
  if (
    !$entity instanceof CommentInterface ||
    !$entity->hasField('comment_body') ||
    $entity->get('comment_body')->isEmpty()
  ) {
    return;
  }

  $id = $entity->id();
  $body = (string) $entity->get('comment_body')->value;

  // Match any Cyrillic character.
  if (preg_match('/\p{Cyrillic}/u', $body) === 1) {
    // Capture the author ID before deletion (0 for anonymous).
    $uid = (int) $entity->getOwnerId();

    // Hard-delete the comment (policy choice).
    $entity->delete();
    // If you prefer to *unpublish* instead of deleting
    // $entity->setUnpublished();
    // $entity->save();

    \Drupal::logger('my_module')->warning(
      'Deleted a comment containing Cyrillic characters. User ID: @uid, Comment ID: @id',
      ['@uid' => $uid, '@id' => $id]
    );
  }
}