The Status LED driver model was changed from NCP5623 to IS31FL3195. This new LED is supported in PX4 1.14 & Ardupilot 4.4.0 and later.

For Ardupilot version 4.4.0 to 4.4.3, you will need to go to the parameter NTF_LED_TYPES and enable IS31FL3195 External & IS31FL3195 Internal.
If you have a custom firmware or you are unable to upgrade the firmware version, please review the following Pull Requests that enabled the IS31FL3195 LED Driver.

PX4

PR# 21440
PR# 21718

Ardupilot

PR# 24010
PR# 25536
PR# 25537
If you want to know the meaning of the status LED, please refer to page below:
GPS LED & Buzzer