Hi @Just_learn , welcome to Microsoft Q&A forum.
As you have rightly mentioned there is no way to disable the SSL/TLS in Azure Sql Database. This is designed keeping the security and vulnerability prospects of the database.
https://learn.microsoft.com/en-us/azure/azure-sql/database/security-overview
There is more details available on the same at the below link.
https://learn.microsoft.com/en-us/previous-versions/technet-magazine/hh351833(v=msdn.10)
Could you please let us know the requirement as to why you would want to disable it?