Name change on AppleCard
How do I change my name on my AppleCard, and request a new card with my updated name?
Question marked as
See the following from Manage your Apple Card account - Apple Support
If your name or phone number changes, contact an Apple Card Specialist at Goldman Sachs1 to update your account information.
and
Open Wallet on your iPhone and tap Apple Card.
Tap the more button 
Then tap the Message button to start chatting with an Apple Card Specialist.