RPMB Key not show brand/model .Show only Enter Custom Key.

MookMobile

RPMB Key not show Brand/model .Show only Enter Custom Key
Help PLZ. RPMB Key do not show model Vivo or any brand .Show only Enter Custom Key.
I want to fix Vivo Y15S by Program eMMC Key.
My eMMC Tool Program do not show model Vivo or any brand.
It show only Enter Custom Key.

How I Fix it.PLZ.
-i had reinstalled the program.
-i had Sychonize file already.
-same problem program version 18.