I do not want to use hooks, I want to actually rewrite this page. I don’t want to touch any of the plugin files neither. I think X theme uses woocommerce.php, as when I’m on a product, this is what template is being used. I want it to use single-product.php, if I can’t, how can I edit this?
That is possible technically but that would fall beyond our scope of support since heavy modification is required for the single product template for that. You might want to contact our trusted partners who caters X setup and customization needs. Please see https://community.theme.co/custom-development/.