Hi,
We have created a custom payment method called credit which allows the customer to place an order using credits assigned to them, The invoices of these Orders are considered as due payments to pay this due payment we need to get all the payment method installed in Magento in the custom page as it is in checkout page,
please find Images below,Thank you
https://ibb.co/sHn5wH6
https://ibb.co/FDf9WNR