change payment card on icloud+ ?

Emboldening mine:

Reorder payment methods on your iPhone, iPad, or Apple Vision Pro

1. On the Payment & Shipping screen, tap Edit.

2. Touch and hold a payment method to drag it further up or down your list of payment methods. Apple will attempt to charge your payment methods in the order that they appear.

3. Tap Done.

If you already have a payment method on file, learn how to change or update your payment method.

Add a payment method to your Apple ID - Apple Support

Subscriptions, etc., are always taken from whichever card you chose as your default card, which you can change anytime you want.

Open Settings > Wallet & Apple Pay and scan down to Transaction Defaults and choose whichever payment method you want as Default Card.