Can I just throw in a little gripe that I hate how some software/terminals don't require the person operating the system to press the button on the register to activate the terminal (aka the "credit" button) and still allows a card chip/swipe? I've run into a few instances where the terminal is ready for chip/swipe, but not contactless and so the assumption is that they don't support NFC payments.
We have First Data terminals at work and they'll only fire up contactless once the total is entered - since some people wanted to use Apple Pay (and Google Pay, etc.), we trained our staff to follow those steps instead and it's worked nicely.
I was at a Panda Express the other day and they recently put in some mx915s and it looks like the generic software. I tried to use Apple Pay, but the person ringing me up insisted I insert/swipe the card before they hit whatever they needed to on their POS to accept a card read. After that, I briefly saw the screen with all three interfaces (looks like ones on a McDonald's), so I suspect it is working, but haven't had a chance to test it.