Is there a way to transfer money from a giftcard to Apple Pay?

Is there a way to transfer money to Apple Pay?

No, it is not possible.

Apple Pay is the way to pay. It replaces your physical cards and cash with a method of payment that is private, easier and safer. Whether you pay in a store, on a website or in an app. This is the new payment.

it is actually the same as paying contactless with your bank card, only via the iPhone.

See -> Use Apple Pay for contactless payments on iPhone

Use Apple Pay for contactless payments on iPhone – Apple Support (UK)

to transfer money from a giftcard

If you have a App Store gift card you can add to your Apple ID balance.

See -> Add money to your Apple ID balance

Add money to your Apple Account balance - Apple Support (IN)

-> How to redeem your Apple Gift Card or App Store & iTunes gift card

How to redeem your Apple Gift Card or App Store & iTunes Gift Card – Apple Support (UK)