@Gopinath Rajee Welcome to Microsoft Q&A Forum, Thank you for posting your query here!
Firstly, apologies for the delay in responding here and any inconvenience this issue may have caused.
Could you enable monitoring (Monitoring Azure Blob Storage | Microsoft Learn) and enforce authentication via RBAC/ACLs. This way they would be able to see all operations (reads, writes, deletes, folder listings etc.) and have access to the associated user identity that performed the operation. – personally I have never come across a scenario where the logs would be missing.
Please let us know if you have any further queries. I’m happy to assist you further.
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