Hello,

Your screenshot does not show the page URL so I tested this one demo/chivette-usb-personalizzate/

I have set the following: http://prntscr.com/km1y6y

The page has the sidebar as per settings: http://prntscr.com/km1yjf

“Hide tabs headings” option hides only titles but not the tabs. In order to hide the tabs follow the instructions provided by Woocommerce https://docs.woocommerce.com/document/editing-product-data-tabs/

Best Regards