Are card rewards like the ones you get from the Gemini visa or the Fold debit card taxed?

I’m thinking of applying to get either the Gemini Visa Credit Card or the Fold Debit Card. I might go for the Fold so that I can also use it to directly buy crypto since most if not all credit card companies don’t let you buy crypto or the fees are high since it’s counted as a cash advance. I was wondering if the crypto rewards you get from things they offer like “2% back from gas purchases” are taxable. I’m not talking about crypto from staking, just the crypto from those cash back type rewards.