Rock says that encryption of the entire transaction DMs are still on the sidelines; however, the main focus is to enhance applications that have been made official iOS and Android applications:
“We have end-to-end encrypted DMs in the back of our minds. That’s right, I’m talking about from the beginning, that they are intended to function as DMs. I began working on this feature in 2020, but it stalled at the client level. We required native applications to complete the work of developing the client-side protocols, which, at the time, did not have any. In 2021, we officially released an official iOS application, and in 2022 we launched an official Android application. Still, apps need so many requirements before they can be fully encrypted from end-to-end DMs that they’re still in the background.