add_action（'woocommerce_product_thumbnails'，'woocommerce_single_variation'）不会移动产品变体描述

I have a woocommerce variation product. I want to move the product variation description to under the product thumbnails on the product page.

For example, please see the associate screenshot:

Where it says "Specifications" appears when I make a variable selection (i.e. magnification & reticle) but it appears under the options selection. I want it to appear where the red arrow points at.

What I have tried was a simple function in functions.php :

add_action( 'woocommerce_product_thumbnails', 'woocommerce_single_variation', 20 );

As that is where the hook is located on the Woocommerce product page. But this didn't change anything on the product page.

Any advice?