I assume you are referring to End to End Encrypted (E2EE) messaging apps here. I'm no programmer/developer/software engineer and I'll be the first to admit that I don't know a ton about how most apps work on the backend. That being said, my understanding is that E2EE apps decrypt whatever is being transmitted to them when they get to your device (assuming phone here) (of course it would decrypt it, otherwise how would you make sense of the information?). Once the data is on your phone, it is decrypted. From what I understand, sandboxing apps is not all that robust on Android (at least on "mainstream" versions)
Therefore, the data that was Encrypted from End to End was decrypted at the End and therefore accessible by other applications and processes on your phone. Unless Android sandboxing has improved greatly in the last few weeks.
He needed to find a way to bolster government revenue so that he could give his billionaire buddies that bought him the election a nice tax break. As they say: don't let a good crisis go to waste.
I currently have some notes in Nextcloud notes which I quite like. I don't need anything too fancy. Markdown is nice to have, but not required if there is some ui way to make checkboxes. If I remember correctly, in the nextcloud notes app you have to set the folder that it uses. Which makes shared notes impractical, if not impossible.
Because of this, I still have several notes shared with my wife in Google keep for things like shopping lists. I'm tempted to test out the shopping list function in home assistant, but not sure if it will fit the needs. Would be nice to find something that covers all my use cases in one app.