​​​​​​​Would you like fries with that check-in?

If it's not on the onward boarding pass you should get them reprinted once in the States before going through security. Assuming you have Global Entry which is why it is normally offered, although have heard it appearing randomly.

EDIT: VS/DL have the same IT issue where Precheck appeared on my flight TO L.A. but not on the internal connections. Precheck made me reprint boarding passes with TSA Pre shown.

And that Google was working when he posted it.

Last week the agent at the F desk at LGW knew nothing about the fact that a 4 class 777 used on a 3 class service would have a front cabin that might / might not be being used. She assured me that as I was in row 10, I was right at the front of the aircraft as that is what her screen showed. Her colleague at the next door desk had to explain about the front cabin, and to tell her how to get me a seat there.. One would assume that the agents at the F desk would be better clued up than the others about seating in the premium cabins, but experience suggests that they are not ! Why should one then expect them to know what goes on several thousand miles away ??