AWS Lambda 中的 list_objects 方法不能直接用于跨账户操作。为了解决这个问题，可以使用 AWS 的对象复制功能。假设您需要从账户A读取账户B的存储桶中的对象列表，您可以在账户B中创建一个可在账户A访问的对象复制规则。然后，每当对象被加入账户B的存储桶时，会自动被复制到指定的位置。接着，通过AWS SDK中提供的 list_objects 方法，访问指定位置上的对象列表即可。下面是一个基于Python的代码示例：

import boto3

def lambda_handler(event, context):
    source_bucket = 'source-bucket-name'
    destination_bucket = 'destination-bucket-name'

    # 创建对象复制规则使得存储桶在两个账户之间自动同步
    s3 = boto3.resource('s3')
    replication_config = {
        "Role": "arn:aws:iam::123456789012:role/ReplicationRole",
        "Rules": [
            {
                "Status": "Enabled",
                "Priority": 1,
                "Destination": {
                    "Bucket": "arn:aws:s3:::{0}".format(destination_bucket),
                },
                "SourceSelectionCriteria": {
                    "SseKmsEncryptedObjects": {
                        "Status": "Enabled"
                    }
                }
            }
        ]
    }
    bucket = s3.Bucket(source_bucket)
    replication = bucket.Notification().create(
        TopicConfigurations=[
            {
                'Id': 'replication',
                'TopicArn': 'arn:aws:sns:us-east-1:123456789012:ReplicationTopic',
                'Events': ['s3:ObjectCreated:*']
            }
        ],
        QueueConfigurations=[
        ],
        LambdaFunctionConfigurations=[
        ],
        ReplicationConfiguration=replication_config
    )

    # 使用list_objects方法，读取同步后的目标存储桶中的对象
    s3_client = boto3.client('s3')

    objects = []
    truncated = True

    while truncated:
        response = s3_client.list_objects(Bucket=destination_bucket)
        contents = response.get('Contents')
        if not contents:
            break
        objects.extend(contents)

        truncated = response.get('IsTruncated')
        if truncated:
            marker = response.get('NextMarker')
            response = s3_client.list_objects(Bucket=destination_bucket, Marker=marker)

    return objects