I've opened the box and looked at the memory chip and googling it shows it is eMMC (Micron Part number 4QA98 JWA60).
I read everything multiple times, and the instructions for NAND say to first use the Erase option in Multitool, but this option doesn't work for me either (even if we assume mine has NAND), so im not sure how to progress from here.
* I apologize in advance if i overlooked or missed understand any of the instructions as English is not my native language