For one of my classes on Canvas, announcements are not showing up on the To-Do list, neither am I receiving email notifications. I have checked the notification settings and they all look perfectly fine with announcement notifications on, both for the account and for the class. I have also checked the spam, trash, and archives of my email and they do not show up there.
For what it's worth, these are my notification settings, the first being my overall notification settings and the second being the class notification settings (and the top slider for the class is set to "On").