this sytem is really fucked up actually , if you use one single key Nsec to all nostr app then when you delete on one nostr app, then it also delete on another nostr app ..while actually you only want to delete on one apps.
Discussion
The notes are not in apps, they are on relays. You could configure different relays in different apps...
Some clients could offer settings that allow certain posts to be stored only locally, without ever being published to relays.
For example: an option like “Don’t publish to relay” for temporary or draft notes.
Pros:
No need for global deletion – the content never leaves the device.
Cons:
Limited to that specific client – it won’t sync across devices or other apps.