You can tap on any of your credit cards from the Home tab, then tap on Pay bill or Pay bill early to initiate a payment using NPCI's Bharat Connect. Make sure to double check the payment amount in the amount input field. You can then execute the payment using any of the UPI apps you use daily.
If your card is not added on Fold, go the Recurring Tab, Tap on Pay Bills, Credit Card, and enter the relevant details to pay your bill.