Cocoon 2.8.4 introduces a beta feature that automatically generates featured images from post titles

Cocoon 2.8.4 introduces a beta feature that automatically generates featured images from post titles. To enable it, go to “Cocoon Settings” > “Editor” tab and activate the option. When creating a post, check the box to generate the featured image, and it will be created upon publishing or saving. If you change the title or author name, the image will regenerate, but long titles may be truncated.

This feature also generates OGP and Twitter Card images automatically. You can customize the background, text, and border colors using filter hooks. However, as this is a beta feature, future changes to its functionality are possible.