Fastboot mode led

I only own a hikey960 so cannot speak for other boards. It seems that no led lights up to make sure that the board has been booted into fast boot mode, almost spent 15 minutes figuring out why my board did not get detected on my desktop only to find out the the wall outlet was loose and the board didn’t power up at all.
so just a simple feature request and i think this can be done via software as there are no less leds present on the board.