CONFIG_KERNEL_COMMAND is not available for thedefaultarchitecture x86.
Result is shown for architecture h8300
default or selected kernelversion does not have config value CONFIG_KERNEL_COMMAND.
Result is shown for kernelversion 6.2.5

Buildin command string

configname: CONFIG_KERNEL_COMMAND

Linux Kernel Configuration
└─>Kernel hacking
└─>Buildin command string
In linux kernel since version 2.6.12  
builtin kernel commandline strings.