Can I edit the course completion certificate?

No, you cannot edit the course certificate. It is system generated. However, you can upload another certificate on the same page.
 1. Click Upload to import a new certificate that is relevant to the course.Engagedly-Level-Up-Your-Work-Force_-_2022-07-13T202845.464.png
2. Enter the required details and click Attach to import the certificate.Engagedly-Level-Up-Your-Work-Force_-_2022-07-13T203031.326.png
3. Once done, click Upload.