PIN Access to iOS Managed Applications with Application Management Policies

Hello together,

I'm currently wondering: I created all available Managed applications in SCCM for iOS Devices. These applications includes the Managed Browser, Word, Excel, PowerPoint, OneDrive, Outlook, OneNote and Work Folders

I deployed these applications as required with Application Management Policies, where I set the require simple PIN for access to "Yes".

Now when I have installed these applications and open them, then only the Managed Browser, Work Folders, Outlook and OneNote asks me for a PIN.

Word, Excel, OneDrive and Powerpoint don't ask me for a PIN. Does anybody know why this is happening or not happening?

Thanks for every answer in advance.