DJ1 if icas is the onely science comp you've done in the last 2-3 years then maybe don't add it to your cv but mention it in the interview but if you've done multiple then yea definitely add it
i didn't mention the comps individually but had this in my cv instead
"Multiple science competitions (2018-2025)
Over the years, I have participated in STEM competitions including ICAS, the Big Science Competition, ICQ National Chemistry test and more. "
so that way you save space and have more time to talk about your life outside of academics, but if you don't have too much then yea list them individually to kill space
