can I use apple account balance in a store

This document outlines what you can buy with your Apple ID [Apple Account] balance --> What you can buy with your Apple Gift Card or Apple Account balance - Apple Support

You can use Apple Gift Card to purchase products or accessories at an Apple Store.In countries and regions where Apple Gift Card is available, you can

use your Apple Account balance to buy products and accessories at

apple.com or in the Apple Store app. In these countries and regions,

your Apple Account balance includes the balance from any Apple Gift

Cards or App Store & iTunes Gift Cards that you have redeemed.