hello elad6,
since you’re working with Orin Nano, which use below for image flashing.
please also check you’ve update EKS image accordingly.
for instance,
$OUT/Linux_for_Tegra/tools/kernel_flash/images/internal/eks_t234_sigheader.img.encrypt
BTW,
you may see-also Topic 264454 for the steps we’ve tested disk encryption.