cant fully test it currently, since I'm under linux right now.
But in general, you need to set hekate to usb mode for the sysnand.
For that open hekate (hold Vol minus while turning it on), then Tools->USB-Tools->press Read only to disable it-> eMMC Raw GPP.
From there on you should be able to mount it in the tool.
Oh, and I didn't know it will be used from the root, so
@ohheplays might also need to check if there is a `exosphere.ini` in the root, maybe he is lucky and its prodinfo blanking is just enabled there.