Hi Brian,
In short our plugin can’t send the font list in Google Font list of Divi. However there are many options to apply the fonts to them.
1. You can assign the font to our pre defined elements from font assign section. And the font should be assign if those custom elements are using the same elements.
2. If you know bit of css, you can write custom element to assign the font.
3. This is new feature from 4.6. Usually divi accepts custom class. You can keep the same class as the name you defined for the font when uploading.
Hope this helps. Also, you may check this thread from one of the user of Divi Theme and Use Any Font. https://dineshkarki.com.np/forums/topic/does-this-work-with-divi#post-6708
Thanks