default or selected kernelversion does not have config value CONFIG_CRASH_CORE.
Result is shown for kernelversion 6.9.9

CONFIG_CRASH_CORE (not configurable)

modulename: crash_core.ko

configname: CONFIG_CRASH_CORE

Linux Kernel Configuration
└─>General architecture-dependent options
└─>CRASH_CORE
In linux kernel since version 3.10 (release Date: 2013-06-30)  
source code:
arch/arm64/kernel/crash_core.c