Hello,
Unfortunately, there aren't any test files that can be provided by NetApp for you to test the BlueXP Classification functionality.
You can enable Classification on your ONTAP cluster (Cloud or On-premises) and map the required volumes that you would like to scan for personal and classified information.
I am herewith attaching a document that provides a high-level working mechanism of BlueXP Classification:
Learn about BlueXP classification | NetApp Documentation