Can I use my Apple ID in regular stores?

Not your Apple ID. You can with Apple Pay.

To learn 'What you can buy with your Apple ID [Apple Account] balance', click here --> https://support.apple.com/HT211187

About Apple Pay - Apple Support

You will have to ask Apple if they are prepared to do this for you. Normally once funds are in Apple Account balance the only way to get them out again is to spend them.

Click here --> https://support.apple.com/choose-country-region/media-services Select your country, then a product. If you don't see one that handles your issue then keep experimenting with selections until you reach one that gets you a chat session or a telephone call and get the representative to redirect you.

or:

Contact Apple for support and service --> "See a list of Apple phone numbers around the world."

Click here --> https://support.apple.com/HT201232

You can’t transfer your Apple Account balance to another payment method. From the article below.

About unused Apple ID balance

You can't redeem or return Apple Gift Cards, App Store & iTunes Gift Cards, or unused Apple ID balance for cash, except as required by law. If your jurisdiction allows for refund of redeemed gift balances, you can contact Apple Support to request a refund. - When you contact Apple, please include the following information:

Your Apple ID.   -

The refund amount.

Your current shipping address.

Apple ID balance - View  *

From:

Check your Apple ID balance - Apple Support

"About unused Apple ID balance

You can't redeem or return Apple Gift Cards, App Store & iTunes Gift Cards, or unused Apple ID balance for cash, except as required by law. If your jurisdiction allows for refund of redeemed gift balances, you can contact Apple Support."

The information provided in another post is a bit confusing since the title of the link tucked away at the end of the post doesn't match the actual document title.