Follow these steps to publish your individual lectures before publishing your course.
Step 1: Publish each lecture individually
Step 2: Select Publish Course on the left navigation panel
Step 3: You will be prompted to set a course URL and select a Topic in which you would like this course to appear.
If you are not an admin of your Udemy Business account, you will be prompted to “Request Publishing Course.” An admin will need to approve for publishing.