"Purview DLP policy is not working as expected."

I am creating a DLP policy with the following configurations:

A new policy applied to devices was generated.

--SCOPE

Devices

--USERS

DLP_TEST

--A rule is created: DLP_TEST_APPSBLOCK

--THE FOLLOWING CONDITIONS ARE ADDED

Document could not be scanned

Document did not complete analysis

File type is:

• Word Processing
• Spreadsheet
• Presentation
• Archive
• Mail

File extension is:

• py
• txt
• HTML

--THE FOLLOWING ACTIONS ARE ADDED

Application groups: DLP_TEST_APPS

Copy to clipboard: Block

Print: Block

Copy to USB: Block

Copy to shared network resource: Block

--APPLICATIONS NOT IN THE SHARED APPLICATION GROUPS

Configuration: Block with override

--NOTIFICATIONS

Use notifications to inform users and properly teach them about sensitive information: Enabled

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In restricted applications, even though I have blocked everything, it still allows me to attach documents from WhatsApp. Although it prevents copying or dragging, I can always upload documents, which should not happen.

This is just a test, but I would like to know what is happening and how I can solve it