Can I use Apple Gift Card I bought from Target to redeem to buy an iPhone?

Terms and Conditions for Apple Gift Cards and Codes, Apple Account Associated Balance, and Content Codes

https://www.apple.com/legal/internet-services/itunes/giftcards/

- "However, only physical and digital gift cards and codes can be used towards purchases in Apple Retail Stores. Your Associated Balance cannot be used for purchases in Apple Retail Stores."

this is not an instant chat or Apple support site - we are all other users here.

I believe you can use it - see instructions here:

https://www.apple.com/shop/browse/home/giftcards/redeem/overlay

you should be able to use a combination.

https://www.apple.com/shop/help/payments