Note: Database writing methods are not supported by Microsoft, and if used, will impact your Microsoft warranty.

Once enabled, you should now have the following options, which require direct database writing:
The ability to preserve the metadata for deleted AD users and all other functionalities requiring direct database writing require that the connection to the target SharePoint environment is either via the Local Object Model (OM) or the Remote Connection (Metalogix Extensions Web Service). Additionally, it requires that the migrating account be a db_owner to the target content database.
DB writing is not supported for SP2019