For self-study courses, certificates can be auto-generated once the course is complete. You can do this by:
Click on “Courses” on the “Navigation” bar on the left side of your screen
Select “Manage Courses” from the drop-down.
Click on the drop-down menu in the form of three dots against the course for which the certificates are to be auto-generated
Click on “Edit”.
Once done, Go to the “Settings” page and
Select the certificate you want to issue at the end of the course, check the box given below saying "Auto generate for self study" as shown in the screenshot below.
Click on “Save”.