yes you right , not at all firmware emmc/emcp <ffu update> include..
but i believe someday ufi will share it...
step by step but sure....
waiting for update ufi emmc tool box version...
in ufi version 1.3.0.1156 additional firmware appear
sk hynix
HYNIX-hB8aP(3)
HYNIX-hDEaP3(2)
micron
MICRON-S0J9D8(167)
MICRON-S0J9F8(16)
so i just need wait for other FFU file