Hi,
You can use SDKManager to re-flash Orin Nano developer kit for enabling super mode. Or download the packages through SDKManager:
Overlay to add MAXN mode to existing Jetson Orin Nano on top of Jetpack 6.1 installation - #7 by DaneLLL
And run manual steps to re-flash the system:
Quick Start — NVIDIA Jetson Linux Developer Guide 1 documentation