seems correct to me, but I don't use Windows so I'm not 100% sure. But you should see two partitions with blkid, with output similar to this (it's an experimental box, partition names are not real)
Code
tvchiptryp:~ # blkid
/dev/rknand0p1: LABEL_FATBOOT="SYSTEM" LABEL="SYSTEM" UUID="3003-4337" BLOCK_SIZE="512" TYPE="vfat" PARTUUID="22aeff87-01"
/dev/rknand0p2: LABEL="STORAGE" UUID="7e1f7cb6-2d57-45d8-bc99-ac316c2f31f6" BLOCK_SIZE="4096" TYPE="ext4" PARTUUID="22aeff87-02"
Have you tried using a rufus alternative!?