When I was a kid in the 1980s, distant buildings were bombed too, and endless Cold wars and Middle East wars etc were a given too. However, your average 12 year old doesn't deeply care about finance or politics or distant wars. Their day-to-day routine goes on. Those are adult problems.
With Covid, the difference is that it came home, for everyone. And not just the US, but globally. Every home was directly affected, for months or years. 9/11 or 2008 didn't lock down entire countries for weeks and months at a time, impose country wide curfews, close all schools, suppress all socialising, impose home schooling, adults/parents working from home or not-at-all, shuttering of global supply lines, increased mortality fears for all older relatives, and constant everyday panic headlines and monitoring for years. We're still working through the aftereffects. So yes, very unique, in its direct effect upon the youth of wealthy countries in modern society.