default or selected kernelversion does not have config value CONFIG_LEDS_ALIX2.
Result is shown for kernelversion 6.2.5

LED Support for ALIX.2 and ALIX.3 series

modulename: leds-alix2.ko

configname: CONFIG_LEDS_ALIX2

Linux Kernel Configuration
└─>Device Drivers
└─>LED Support
└─>LED Support for ALIX.2 and ALIX.3 series
In linux kernel since version 2.6.29 (release Date: 2009-03-23)  
This option enables support for the PCEngines ALIX.2 and ALIX.3 LEDs.
You have to set leds-alix2.force=1 for boards with Award BIOS.

source code:
depends
CONFIG_LEDS_CLASS
CONFIG_NEW_LEDS
CONFIG_X86
NOT CONFIG_CS5535_GPIO
NOT CONFIG_GPIO_CS5535