You can display accordions as WooCommerce product FAQ tab as follows,
- You need to create an accordion first.
- go to the product edit page and see the sidebar see the “Product FAQ Tab” widget.
- Search for the accordions you want to display as faq tab and select the accordions.
- Write a tab title.
- save/update the product.
- Visit the product page and you will see the new tab just added by your given title.