Hi @AreEnEn
You can open Azure portal -> Subscriptions -> Resource Providers, search for "Microsoft.Sql", if this is registered, you will receive the notification. If there is no SQL resource created in the subscription, you can ignore the notification email
The alert is on the azure advisory refers to an update that is being done on the APIs from azure.
The retirement notice is specifically about the API version used for managing and interacting with Azure SQL Database resources programmatically.
If you are currently using the Azure portal, Azure CLI, or Azure PowerShell to manage Azure SQL Database, you need not to take any action.
Hope this helps! Let me know if you have any further question or need additional information.
Thank You!