No, Nomura didn't draw this. Some Guy Who Draws Kingdom Hearts isn't reliable. Besides the fact that Sora's hands are a nightmare, that's just not how he draws or colors
The argument that AI rearranged the characters is bunk too; GenAI is bad at surgical editing (hence humans having to clean up)
Melo
Kingdom Hearts fans are losing it over apparent AI-modified box art, but some think they may have unraveled the weird mystery behind what exactly is going on with it https://kotaku.com/kingdom-hearts-fans-think-theyve-unraveled-the-bizarre-mystery-surrounding-alleged-ai-assisted-box-art-2000704609
It's possible the original Tetsuya Nomura art was tweaked with genAI