How to split payment for AppleCare+ for macbook using Apple gift card and credit card?

I recently got a macbook and has past the free 7 day AppleCare+ and is within 30 days. I would like to extend the 3 year AppleCare+.

The 3 year AppleCare+ for macbook is $329. I have an Apple gift card of $306.50 and would like to pay the remaining balance of $329-$306.50 = $22.50 using credit card.

Following the online instruction by going to System Settings> General>About than click Add in AppleCare+

There are no options to pay by Apple gift card. Only Apple pay and credit card.

How do I go about splitting the payment via Apple gift card and credit card?

Do I have to redeem the Apple gift card in App Store?

Then the system would display different payment options?

I don't want to redeem in App Store only to realise I can't use that amount for AppleCare+

At this moment when writing this post, this link on what one can do with Apple Gift Card does not mention AppleCare+

What you can buy with your Apple Gift Card or Apple Account balance - Apple Support

Thanks