If you are using Elementor or any other page builder for the product template, you might have trouble showing the custom tabs.
In that case, go to the product template editor page and remove the product tabs widget. Instead, use our “WPB WC Product Custom Tabs” Elementor widget to show the changed tabs.
You can use this shortcode instead of the product tabs widget if you use a different builder, like Divi or something else.
The ShortCode
[wpb_wctm_product_tabs]