Generally, charging the customer for specific payment provider indirectly makes product costly to buy for customers. Instead of that, if you separately charge a customer for payment fees, they can choose their convenient payment option. Magento 2 Payment Fee extension by MageComp allows store owners to charge payment provider fees transparently by adding it to order subtotal. Not only this, but it also helps store owners to motivate their customers to select their convenience option to prevent surcharge fees.