Why won't my visa prepaid work as a payment method?

Find what is acceptable in your country in this list:

Payment methods that you can use with your Apple ID - Apple Support

Note that a prepaid card may not be regarded as a debit or credit card, even if it says "Visa" on it. You may need to transfer it to a payment type that Apple does accept.

Not all payment methods can be used as a registered payment method for your AppleID account:

Payment methods that you can use with your Apple ID - Apple Support