Credit limit increase

The following from Legal - Data & Privacy - Apple may help:

Apple Card Support

If you have questions about Apple Card, you can contact support through your Wallet app by initiating Messages. Apple will use any information you share, including personal information, to process your request. If your inquiry must be sent to Goldman Sachs for servicing, Apple will share information about you and your inquiry with Goldman Sachs so that they may better help you. Apple will not retain any personally identifiable financial information that it sends to Goldman Sachs for servicing. You can also contact support directly with questions by calling 877-255-5923.

Also see the following from How to view your available Apple Card credit details or request a credit limit increase - Apple Support

Goldman Sachs will consider your payment history with Apple Card and other credit information to determine whether to grant any request for credit limit increases on Apple Card.1 This means you may need up to six months or more of payment history with Apple Card before Goldman Sachs can approve your request for a credit line increase.

Learn how your initial Apple Card credit limit is determined.

This is primarily a user-to-user support forum; other Apple users like you. We cannot do that for you. Click on the following and use the instructions there: How to view your available Apple Card credit details or request a credit limit increase - Apple Support