Yes, unfortunately, it is not possible to use this feature on a single product page. No matter if you are using our theme’s element or any other product page builder. It is developed by WooCommerce to be used on the shopping cart page only.
Example product (single page) is an oled TV. And I want to sell TV stand and wall mount ect. These are cross selling products. So I set these products in cross selling options in admin, but how can I display it?