Trying to purchase an Apple Care using gift card
I´ve got an iMac recently and so I´ve decided to add some extra coverage and adding the apple care to it. But I don't know why I can't use apple gift card as payment, since the website it only allows me paying the coverage through credit card (which I don't have right now), it annoys me the fact you can only pay by using a credit card. I saw here that it is possible to use gift card as payment method, so how can I use my balance as payment method? I'm living in Japan, I don't know if this has something related to.
iMac 24″, macOS 14.0