Hi @jtorresr, thanks for your question and sorry to hear that some of your students are missing their announcement notifications. It is not the expected behavior that manually created courses would not send announcement notifications.  Students should receive announcement notifications in any course that is published. However, here are a few things to consider:

- Is this happening to all your students? Is it possible that a few students who are not receiving announcement notifications have their settings turned off in their user account settings or Mobile App? 

- If you imported your announcements from another course, have you adjusted the dates correctly to align with the new course? 

- When did you create the announcements? If they were created before the course start date with the "Students can only participate in the course between these dates" setting enabled will not trigger notifications for students.