Finding account and routing numbers and associated bank

You can transfer funds, which is actually reloading your Apple Cash virtual card, a prepaid debit card. Prepaid debit cards do not have account numbers and routing numbers.

Funds can be transferred from Apple Cash to an account with routing and account numbers. Funds transferred to Apple Cash use the cards 16 digit virtual number.

For what? What are you trying to do? You can add your bank account/debit card to Apple Cassh for transfer. See https://support.apple.com/en-us/120401

Something else?