The Apple Card is a credit card as such it has no withdrawal limit, you cannot take or withdraw cash from of it. You can only make purchases in stores, websites and apps with it.
If you mean your credit limit, i.e the amount you can spend on it, then if you have $2000 limit you can spend up to $2000 on it total. If you have already spent $1000 and have not yet paid it, then you only have $1000 left. There is no redemption here, as it's a credit card, not a gift card. Once you've spent an amount you need to pay it.
click here ➜ View your Apple Card credit details and learn how to request a credit limit increase - Apple Support
If you mean some other card or something else, then please clarify.