I was never able to get encrypted syncing working with Joplin. I tried every year or something for a while but it never worked. I kept looking for an Evernote alternative for years. The closest that got there is Leanote, which is a Chinese company's open source product. (https://github.com/leanote)
I finally gave up the search. Switched to unencrypted plain text md files synced with syncthing. On Linux I use Kate. It has a directory tree view and recursive search in said directories. It works great. On Android I am using Markor to point to the same shared directory. I don't think I'll ever start looking for a note taking app again. I also found I don't really take notes much. So there's that. :)
It really is very good. What made me not stick with it? Trying to remember. I think it was the fact that it is a little heavy and support/issues is in Chinese, which I don't speak. Later I simplified my setup and made everything local markdown files, handling sync myself.
You can actually try their hosted service for free. Though looking at it now, most of that is in Chinese too.
I finally gave up the search. Switched to unencrypted plain text md files synced with syncthing. On Linux I use Kate. It has a directory tree view and recursive search in said directories. It works great. On Android I am using Markor to point to the same shared directory. I don't think I'll ever start looking for a note taking app again. I also found I don't really take notes much. So there's that. :)