I want to add my debit card
I want to add my debit card
I want to add my debit card
This link explains how to add credit and debit cards to Apple Pay→Set up Apple Pay - Apple Support
And this link is how to add cards for payment in the iTunes & App Store→Add a payment method to your Apple ID- Apple Support
Note that Apple Pay and the payment method for the iTunes & App Store are not related; while you can use the same card for both, there is no requirement that you do.
To add my debit card
I want to add my debit card