I connected a WS2812 Neopixel LED in Aux1 port of pixhawk 2.4.8 and do followed setting
Servo 9 - Neopixel 1
NTF_LED type _ neopixel (all bitmask)
NTF_LED LEN - 2(as i used 2 LEDs in series)
In this way the ws2812 LEDs are glowing same as pixhawk main LED.
But with similar setup in pixhawk cube orange+ the LEDs are glowing white or radom colour. Not same as in 2.4.8