Change bank account linked to Apple pay

I’ll assume your using an iPhone, but if not the support article I linked below covers all eligible Apple Devices.

Update your payment method on your iPhone or iPad

1. Open the Settings app.
2. Tap your name.
3. Tap Payment & Shipping. You might be asked to sign in with your Apple ID.
4. Tap Add Payment Method, enter the new payment method, then tap Done.
5. Tap Edit.
6. Tap the red delete button next to the old payment method, then tap Delete.

If you change your address, the credit or debit card information that you use with your Apple ID might be automatically updated by your financial institution, and you don't need to take action. But if there's an issue, add a new card first, then remove the old card.

If you need to change or update your Apple ID payment method - Apple Support