Hello,
By default, the Single Product Page comes from WooCommerce so you can’t edit it directly with the Page Builder plugin (i.e. either Elementor or WPBakery).
Although, you can create Custom Single Product Layout for the Product page under the WoodMart Theme by using the Layout Builder of the Theme. You can follow the Guidelines here regarding this: https://xtemos.com/docs-topic/single-product-page-builder/
For more info regarding the Theme’s Layout Builder, please check the following Theme Documentation Guidelines: https://xtemos.com/docs-topic/woodmart-woocommerce-layout-builder/
Moreover, you can also access the options related to Single Product page by going to the Dashboard > Theme Settings > Single Product: https://xtemos.com/wp-content/uploads/2020/09/single-product-wd-7.jpg
Best Regards