I've noticed this year that a lot of card system vendors have updated their software to enable contactless on their card machines. I actually use my contactless card all over the place in the US, and I was even shocked and surprised to see that the MARC vending machines in Baltimore/DC supporting contactless to buy train tickets.
The number of US customers actually receiving the cards and being trained to use them is very low, and that's a problem.
As an aside, I actually like plain contactless better than Apple Pay. It's overall a faster transaction, no fussing with phone unlocks. I don't really care whether or not it's more or less secure - that's my bank's problem, not mine.