Exam AD0-E720 topic 1 question 11 discussion

An Adobe Commerce developer wants to override the template assigned to a block named existing.product.block. This relationship is defined in the catalog_product_view.xml layout in the Magento_Catalog module. They cannot simply override the file in their theme, as this change is part of a feature that is being released to the marketplace as a module called "Orange_CustomProduct".
The developer has already created the desired template at app/code/Orange/CustomProduct/view/frontend/templates/custom-product-block.phtml.
What can they add to app/code/Orange/CustomProduct/view/frontend/layout/catalog_product_view.xml in their module to accomplish this?