The comments module allows you to place a comment form anywhere on your page. If you are using a standard page or post without the Divi Builder, comments will always appear below your post content. Once the Divi Builder is enabled, however, you can place the comments module anywhere on your page and the comments form will appear in the location of the module. This gives you a lot more control over your comments! View the full documentation here: https://www.elegantthemes.com/documentation/divi/comments/