sharepoint dlp policies not detecting pdf files with label

Hello Everyone,

I have a Microsoft purview sharepoint DLP policy with a following condition.

I have targeted this to sharepoint online workload and specific site. I have labeled a file using Microsoft purview information protection client in windows explorer and same has been uploaded to sharepoint site(that is in scope of the policy). whenever I am trying to share the pdf file labeled with (confidential / All users encrypted) it is not getting blocked.

Please let me know if I am missing something related to sharepoint.
Note: There is no encryption settings in label, it is just a name.

Conditions

Content contains any of these sensitive info types: U.S. Social Security Number (SSN), Credit Card Number,

Content contains any of these sensitivity labels: Confidential/All Users (Encrypted)

Evaluate predicate for Message or attachment

And

Content is shared from Microsoft 365 with people outside my organization

Actions
Notify users with email and policy tips
Restrict access to the content for external users
Send alerts to Administrator

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sharepoint dlp policies not detecting pdf files with label

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