Is this in regard to an Apple Card Mastercard account? If so, please review the information in the support article linked below.
>>Set up scheduled payments for Apple Card
- On your iPhone, open the Wallet app and tap Apple Card.
- Tap the More button
, then tap Scheduled Payments. - Tap Set Up, then tap Continue.
- To choose the amount that you want to pay, tap Monthly Balance, Minimum Payment Due, or Other Amount.
- If you chose Monthly Balance or Minimum Payment Due, select when you want your payment to be made. Then tap Next.
- If you chose Other Amount, select your payment amount, when you want the payment to repeat, and when you want the first payment to be made. Then tap Next.
- Confirm with Face ID, Touch ID, or passcode. Then tap Done. <<
How to make Apple Card payments - Apple Support