Apply sensitivity labels using PowerShell

[JSlei]

Is it possible to apply sensitivity labels to documents in SharePoint (not sites or groups) using PowerShell?

[#2]

@WJN78 Assuming the document is in SharePoint.

Unlock-SensitivityLabelEncryptedFile (SharePointOnlinePowerShell) | Microsoft Docs

Remove encryption for a labeled document

Might as well add this too (RMS to unified labeling cmdlet mapping)

Use PowerShell with the Azure Information Protection unified labeling client | Microsoft Docs