Again, you will need to do an online search to identify a which companies are writing about this.
To use my Starbucks gift card, Time passes to any Starbucks that excepts the card, order my drink and hand them my gift card. They swipe the card, hand me a receipt that i'm done. https://groups.Google.com/g/giftcard-mall-my-gift-info/c/lJb4jNQqwjY