我认为你可以这样做：

my.listener:
        class: Acme\SearchBundle\Listener\SearchIndexer
        tags:
            - { name: doctrine.event_listener, event: postPersist }
            - { name: doctrine.event_listener, event: preUpdate }

你需要一个事件订阅者而不是一个事件监听器。
你可以将service标签改为doctrine.event_subscriber，你的类应该实现Doctrine\Common\EventSubscriber。你需要定义一个getSubscribedEvents来满足EventSubscriber，它返回一个你想要订阅的事件数组。
ex

<?php

namespace Company\YourBundle\Listener;

use Doctrine\Common\EventArgs;
use Doctrine\Common\EventSubscriber;

class YourListener implements EventSubscriber
{
    public function getSubscribedEvents()
    {
        return array('prePersist', 'onFlush');
    }

    public function prePersist(EventArgs $args)
    {

    }

    public function onFlush(EventArgs $args)
    {

    }
}

从Symfony 6.3开始，不推荐使用订阅服务器。因此，您可以使用以下内容：

Acme\SearchBundle\Listener\SearchIndexer:
        tags:
            -
                {
                  name: 'doctrine.event_listener',
                
                  # this is the only required option for the lifecycle listener tag
                  event: 'postPersist',
                  
                  # listeners can define their priority in case multiple subscribers or listeners are associated
                  # to the same event (default priority = 0; higher numbers = listener is run earlier)
                  priority: 500,

                  # you can also restrict listeners to a specific Doctrine connection
                  connection: 'default'
                }
                
            -   {
                  name: 'doctrine.event_listener',
                
                  # this is the only required option for the lifecycle listener tag
                  event: 'postUpdate',
                  
                  # listeners can define their priority in case multiple subscribers or listeners are associated
                  # to the same event (default priority = 0; higher numbers = listener is run earlier)
                  priority: 500,

                  # you can also restrict listeners to a specific Doctrine connection
                  connection: 'default'
                }