Magento 2 Extra Fee by Cynoinfotech
https://www.cynoinfotech.com/product/extra-fee-magento-2-extension/
The Cynoinfotech Extra Fee Magento 2 module is easy to use and can be configured with just a few clicks. Using this extension, you can create and sell various complementary services to your customers. Here is a full-featured list of our Extra Fee Magento 2 extensions. Extra Fees Extension for Magento 2 enables online stores to add Extra fees for various services and display them on the storefront. The module gives store owners an opportunity to provide better services to customers during their shopping.