Hello,
Thank you very much for choosing our theme and for contacting us.
You can find them in the Dashboard > Layout.
Please check the Woocommerce builder of WoodMart allowing to create custom templates for product pages and other functional pages that are not editable by default. Woocommerce builder is the inbuilt functionality widget included in the builder you use on the site.
Please check this manual: https://xtemos.com/docs-cat/woocommerce-layouts-builder/?theme=woodmart and https://xtemos.com/docs-topic/single-product-page-builder/
If you have any questions please feel free to contact us.
Best Regards