Does Jetson Xavier Nx emmc version support enhanced user data area?

Hello,

I’d like to switch the user data area of Jetson Xavier Nx(16GB) from MLC to pSLC.

I tried the command “mmc enh_area set -y 0 7364608 /dev/mmcblk0”, and it printed

nvidia@nvidia-desktop:~$ sudo mmc enh_area set -y 0 7364608 /dev/mmcblk0
Enhanced User Data Area Size [ENH_SIZE_MULT]: 0x000383
i.e. 7364608 KiB
Max Enhanced Area Size [MAX_ENH_SIZE_MULT]: 0x000383
i.e. 7364608 KiB
Done setting ENH_USR area on /dev/mmcblk0
setting OTP PARTITION_SETTING_COMPLETED
Setting OTP PARTITION_SETTING_COMPLETED on /dev/mmcblk0 SUCCESS
Device power cycle needed for settings to take effect.
Confirm that PARTITION_SETTING_COMPLETED bit is set using ‘extcsd read’ after power cycle

After rebooting, enhanced user data area size changed.

nvidia@nvidia-desktop:~$ sudo mmc extcsd read /dev/mmcblk0 | grep ENH_SIZE_MULT -A 1
[sudo] password for nvidia:
Max Enhanced Area Size [MAX_ENH_SIZE_MULT]: 0x000383
i.e. 7364608 KiB
Enhanced User Data Area Size [ENH_SIZE_MULT]: 0x000383
i.e. 7364608 KiB

However, the the size of /dev/mmcblk0 did not change, it was still 14.7GiB.
In addition, when I turned off and unplug the device, then turned on it, enhanced user data area size backed to 0x000000.

Does Jetson Xavier Nx emmc version support enhanced user data area? Or did I misunderstand power cycle?