s3 bucket deleted files

To investigate deleted files from an S3 bucket, check CloudTrail for API activity, review server access logs, inspect lifecycle policies, and validate bucket policies. Enabling server access logging and reviewing application or script logs are also crucial steps in identifying the cause of deletions. If versioning is enabled, check for previous versions of the objects that might still be accessible.

This might be useful too try translate to English :- https://repost.aws/it/knowledge-center/s3-audit-deleted-missing-objects

if you find this useful kindly accept the answer to be able to benefit others