https://hackinformer.com/2017/09/27/can-use-snes-classic-mini-nands-dump-nes-classic-mini/Someone installed an SNES mini dump on an NES mini, so it should be possible to install an EU SNES dump on a US SNES mini. No guide available.
That just flashes the kernel, not the nand.Use the "flash original kernel" option