Credit Limit

IF you had your Apple Card account opened at least 6 months, you can request an increase.

Check your credit details and limit

1. Open the Wallet app on your iPhone and tap Apple Card.
2. Tap the more button .
3. Scroll to Credit Details.

You can see your account Credit Limit, Available Credit, and APR. Goldman Sachs will need your credit history with Apple Card to inform any request for credit limit increases on Apple Card.

Here is the some more info:

Manage your Apple Card account - Apple Support