This applies to the In-App version of the checkout (Checkout V3). If you are using the older version (Checkout V2), you can upgrade the version of the hosted pages.
Summary
When customers need to input their payment information to complete the checkout, the default payment method displayed will be Card, followed by the other payment options that are enabled.
You can display any other payment method by default.
Solution
To reorder the payment methods listed, please reach out to our Support team through support@chargebee.com. These changes cannot be done through the Chargebee admin console settings.
When reaching out to us, please specify the order in which you want the payment methods to be listed out.
These changes can only be requested by the site Owner or Admin(s).