See "Privacy and Security" section.

> And it [Communication Safety] extends beyond Messages to include content sent and received in AirDrop, ..., and third‑party apps.

This distorted Apple's vision of privacy is not news to me, but extending their invasive policy to third-party apps is crossing the line. However, I'm not sure whether this means that they are going to forcefully intercept all content from 3rd party apps, or introduce an API to app developers that will allow them to flag content as sensitive. If anybody knows more about this, please let us all know.