default or selected kernelversion does not have config value CONFIG_PM_GENERIC_DOMAINS.
Result is shown for kernelversion 6.9-rc1

CONFIG_PM_GENERIC_DOMAINS (not configurable)

configname: CONFIG_PM_GENERIC_DOMAINS

Linux Kernel Configuration
└─>Power management and ACPI options
└─>PM_GENERIC_DOMAINS
In linux kernel since version 3.10 (release Date: 2013-06-30)