Actually to clarify, it’s more the chips in credit cards don’t expose enough information to clone the card beyond card number and expiry which you could get traditional ways, and a POS device typically will read what it needs with one way communication and a bunch of encryption.
Everything else on the card needs two way to work, and depends on the card chip I believe whether it supports it.
Mobiles with contactless payment I think work two way, although depends again on the phone. Some require the phone to be working, relevant app and some communication back and forth, like Apple’s pay thing. Others can work without the phone being powered up and rely on the NFC chip that’s usually in the battery, which links to some data in a special payment enabled SIM. I believe EE’s payment stuff works this way.