Microsoft Purview DLP block all / allow some?

I'm currently implementing Microsoft Purview and have run into the same issue mentioned here. I realize this thread is a bit dated, but I wanted to ask if you were able to find a solution.

In the latest update to the Purview documentation, I noticed that it's now possible to define a list of allowed and blocked applications for endpoint DLP policies. I’ve tried applying the recommended policy settings, but so far, it hasn’t worked as expected.

Has this security gap been addressed in any recent updates? I’d appreciate any insights or workarounds you might have found. You can find more details in the official documentation here: Configure endpoint DLP settings: https://learn.microsoft.com/es-es/purview/dlp-configure-endpoint-settings?tabs=purview#block-all-apps-except-for-a-list-of-allowed-apps