MAGENTO 2 PAYMENT CHARGE
Payment charge Magento 2 extension allows admin to add payment method charge from their customers. The owner can set fixed or percentage charges on any payment method. Magento 2 Payment charge extension by CynoInfotech helps store admin to add payment method process fees in product order subtotal. Store owners can set payment method process fees from the backend on any selecting payment methods as a fixed price or as a percentage price. So the charge of payment process fees is appearing with the price of the product at the time of payment method selection. The store owner will set payment method charge on subtotal or grand total of the order.
https://www.cynoinfotech.com/product/payment-charge-magento-2-extension/