Not sure which country you’re in but in the U.S. I haven’t seen many gift cards that are contactless tap-to-pay so you would want to double-check. Without tap-to-pay those type of cards would need to be added into a phone app (Google Wallet / Apple Pay) to be able to tap-to-pay using it.

It’s possible outside the U.S. it’s more common for gift cards to be able to tap-to-pay.

Or if you’re talking about store gift cards then the same applies, most of those aren’t tap-to-pay either so you’d want to double-check.

Don’t say cash - lots of places don’t take cash any more.

where do you live?

here, afaik, they’re obliged by law to accept cash

ps: i checked. Cash can be refused only under specific conditions (Dirty, torn, counterfeit, more than 50 pieces &c