I’ll give the hard line. There are kids who will have only 2 years. But key is why. Not being able to fit it in because of, say, a schedule conflict with a desirable, rigorous class can be understandable. (More often, this is a stem kid taking higher level math, sometimes DE, that conflicts.)
Adcoms want to see choices make sense. Foreign language is often needed for something like a history major. The replacement wouldn’t be just any AP. And unless an activity is presenting a high level, somewhat rare opportunity, you can’t just explain it in Addl Info.
We don’t know what courses he’s taking or plans to.
This is a tough decision, when it’s a highly competitive college. Did you consider an online course or summer session? At least, that shows effort to carry forth. Or can he pick up in senior year? That could be CYA. You do have options and some time to accomplish this.