The new SharePoint block download policy applies at the site level to stop users downloading files, even to work with them using the Office desktop apps. It also stops people printing and synchronizing files. In this article, we explain how to apply the policy with PowerShell, including how to apply the SharePoint block download policy to all sites assigned a certain sensitivity label.
https://office365itpros.com/2023/02/28/sharepoint-block-download-policy/
