By default WooCommerce adds 3 tabs/blocks:
- Description – product description
- Additional informations (renamed in Rey as Specifications) – automatically filled with product attributes;
- Reviews – product reviews.
Rey adds a custom tab/block called “Custom Information“, which can contain any content, and can be edited globally (in Customizer) or individually per product (in product backend, Info Block tab).
For all of these tabs/blocks, please access Customizer > WooCommerce > Product page – Tabs/Blocks and you can find various options to customize, change order, or rename.
Please access Customizer > WooCommerce > Product page – Tabs/Blocks and scroll at the bottom where you can see the Custom tabs control that lets you add as many as you want eg: https://d.pr/i/17QlJU . You can add a default title and a priority order value.
To actually add content in this tab, navigate to a product page in the backend and open the Custom Tabs tab eg: https://d.pr/i/KgVUDV . You can change its title and its content.
Simply access Customizer > WooCommerce > Product Page – Tabs/Blocks and scroll at the very bottom where you can choose which tab/block to move into the Product summary accordions block.
Quick video screencast here https://d.pr/v/Dq6SMz .