When you add editors, you can decide if you want them to have access to ward business. Bishopric members probably need access, but your ward music coordinator / bulletin specialist may not!
Tap the 'Publish' button in the bottom right of the screen.
If this is your first time publishing a bullet for the assigned ward, you will need to request approval. This is usually very quick (under 24 hours), and is designed to make sure there isn't spam on the app.