I cant see content-single-product.php in WP Admin –> WooCommerce –> System Status page and am getting this message: “WP Admin –> WooCommerce –> System Status page. Check if “content-single-product.php” appears in the Template section. If it is there, then your theme overrides WooCommerce’s template. To preserve the look and feel of your website Schema App WooCommerce does not override these.”

This message means that your theme does not override the WooCommerce templates, the plugin will work ideally, and you would have no duplicate products in the Structured Data Testing Tool.