u/ApprehensiveLog4922

For context, I am a 22-year-old about to graduate from college. I have been contributing roughly $200-$300 into my Roth since I was 20. Everything so far has only been invested in FXAIX. At the time, I would always see people saying "FXAIX and chill", but is there something I am missing out on? Should I start diversifying into international/midcap? Also, just recently hit the 5k mark! Whoop Whoop! :)