Change unlock bootloader allowed from NO to YES with root?

Hello,

I've recently obtained 2 new old stock Xperia Z1 Compact phones.
Both have their bootloader unlock allowed set to NO.
However, both are also running KitKat 4.2 with a really old kernel and the Easy Root Tool exploit should work to obtain root.

My question is whether the unlock allowed can then be forced to YES with the obtained root permissions and how?
I would like to flash LOS on both

Thanks,
Bobby