Hey @calliewallie,
I did take a look at it but the problems plugin doesn’t display tabs we just collect them.
When WooCommerce made their tabs they made them with a template that can be overridden by the theme so that anyone could display them how they see fit. The Divi theme takes that template and intentionally blocks any tabs from displaying.
This is the same concept of templating your pages on your website its just the same code used over and over again.
If you were to deactivate this plugin right now and switch your theme to a few alternatives they would all look different in their own way. The theme is ultimately responsible for how the site will look in the end and plugins are adding additional functionality to back that up and make it more rich.
The only reason that this plugin is able to function is with the ability to use a filter that is passed on that tab.php template in WooCommerce. So, I’m afraid if they don’t remove the code that is blocking that filter there is no way for your data to get through.
I really am sorry I’m sure its frustrating but there is nothing you can do to change that short of altering the code yourself. If you’re up for a challenge then search through your theme for “woocommerce_product_tabs” and you’ll find the code that is breaking your template.
I wish you all the best and hope you receive the updates from Divi that you need. If not, Gutenberg Full Site editing will be here soon enough so maybe you could give it a fresh start with that!
Goodluck to you, and have a good weekend.