Missing uncomment in GRUB configuration (?)

Hey,
I'm not sure rn but could be the possibility that the configuration

GRUB_ENABLE_CRYPTODISK=y

is missing in the encryption guide?

The comment above states that it'll enabling booting from LUKS encrypted devices, but I'm not entirely sure if it's required.

Or could it be that the uncomment isn't necessary because /dev/sdXY isn't encrypted if I understood it right.