Apple and Android Pay are not mag stripe, they're proper encrypted nfc payments.
Samsung pay CAN be a magstripe emulation, for terminals that don't support NFC.
To clarify, EMV supports tokenized transactions that emulate the _contents_ of the magnetic stripe over NFC, and this is what is broadly used in the US.
Note here[0] that Chase states that only contactless MSD support (contactless magstripe emulation over NFC with a dynamically-generated security code) is required for Apple Pay; a subset of contactless EMV.
