I'm using Spartacus 2.0 front end as angular 9 so here my question is, can we edit the billing address for the specific credit card card and edit the saved credit card? Does Spartacus support the editing of the payment method? And by default we are using cyber source for payment process.
Unfortunatelly you can not edit existing credit card, you can only delete and add new one while checkout. Spartacus doesn't support it due to good e-commerce practices (it is discouraged). If you really need that feature, I can see API looks like ready for PATCH operation. You can check it in POSTMAN and implement if it works.