How to use Jetpack's Comment Feature with the Divi Ultimate Theme

Hello, I am having trouble with the Divi Ultimate Theme using the comment system with the Jetpack plugin.

Here's what the Jetpack plugin advises:

"You check whether your theme uses the comment_form() function by looking at your comments.php file. You’ll find this file in your theme folder. Open it in any text editor and search for “comment_form()” (without the quotes). If that text is not found, then your theme is using the old way (before WordPress version 3.0) of displaying comments.

If your theme uses the old way of displaying comments, we recommend that you contact your theme’s author about updating the theme to use the newest comment function. You can point them to the comment_form function reference."

Here's the full article - https://jetpack.com/support/comments/troubleshooting-jetpack-comments/

Is there a way to update this theme to use that comment system? Any help is greatly appreciated. Thank you!