It would be preferable for privacy if the notification data could be reduced to something as simple as “New Delta Chat Message” by default. Once this metadata has escaped beyond the control of the Delta Chat app there is no guarantee it is being safely handled by the OS.
If you don’t trust your OS you’re already in a pretty bad situation.
I think such tinfoilery is not a good enough reason to justify such UX degradation.
Sure there is the UX to think about but I would not dismiss the concern as tinfoilery. The FBI extracted copies of Signal messages from an anti-ICE activist’s iPhone even after the app was deleted because iOS unsafely stored the notifications on the phone for up to a month, and in the end the activists were convicted of terrorism according to Trump’s designation of antifa as a terror group.
On Signal’s thread, however, users debated whether the update was sufficient, with some urging that best practice is likely still to disable message previews entirely to limit device access to sensitive chats.
Some users agreed that enabling message previews on any kind of device—not just Apple’s—seemed unwise
The OP, in my understanding, is about hiding notification contents by default. There is already an option to hide this info in notification settings.
For better or worse, Delta Chat is aiming to be a messenger for normies. If you are a terrorist, according to your government, I am afraid you’ll have to at least take a look at the privacy settings.