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The database import/export private link is a service managed private endpoint created by Microsoft and that is exclusively used for all communications by the database import/export process, the Azure SQL database, and related Azure Storage services. A service managed private endpoint is a private IP address within a specific virtual network and subnet. The private endpoint has to be manually approved by user in the Azure portal for both server and storage.
Manual approval of the new private endpoint connection is required to complete the export operation. After starting the export, go to "pending connections" in the Private Link Center and approve the connections, which can take several minutes to appear.
Private link is created and handled by Azure platform, so when the import/export operation finished, private link is dropped automatically by the platform.
Here is reference link- https://learn.microsoft.com/en-us/azure/azure-sql/database/database-import-export-private-link?view=azuresql
Thank You