A new project dubbed the Nintendo Switch Re-shell kit, has transformed the Switch or the Switch OLED into a home console with various benefits over its handheld counterparts. Available for under £50, the Re-shell Kit reduces thermals and allows either console to be overclocked without hitting thermal limits.https://www.notebookcheck.net/Nintendo-Switch-Re-shell-kit-converts-gaming-handheld-into-home-console-with-improved-thermals-and-performance.762314.0.html
Does overclocking voids the acces to nintendo store or cancellation of the nintendo account?
Yes as it's required to have a mod chip and custom firmware to overclock.
Just dont ever reset the console cause you need to connect the Joy-Cons to it in handheld mode to even get past the beginning setup screen.