default or selected kernelversion does not have config value CONFIG_ARCH_HAS_FORTIFY_SOURCE.
Result is shown for kernelversion 6.9-rc5

CONFIG_ARCH_HAS_FORTIFY_SOURCE (not configurable)

configname: CONFIG_ARCH_HAS_FORTIFY_SOURCE

Linux Kernel Configuration
└─>General architecture-dependent options
└─>ARCH_HAS_FORTIFY_SOURCE
In linux kernel since version 3.10 (release Date: 2013-06-30)  
An architecture should select this when it can successfully
build and run with CONFIG_FORTIFY_SOURCE.