There are lots of options. Why are you using a chat app for note taking?
Couldn't you just get a markdown note app that syncs with something like syncthing?
If I want to share something with a friend, I can invite them to note chats or bulk forward files. Messages are separate, I can forward individual message rather than all messages. It's more continent than notes apps I've tried.
Privacy has become a very important issue in modern society, with companies and governments constantly abusing their power, more and more people are waking up to the importance of digital privacy.
In this community everyone is welcome to post links and discuss topics related to privacy.
much thanks to @gary_host_laptop for the logo design :)