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

CONFIG_HAVE_IMA_KEXEC (not configurable)

configname: CONFIG_HAVE_IMA_KEXEC

Linux Kernel Configuration
└─>General architecture-dependent options
└─>HAVE_IMA_KEXEC
In linux kernel since version 3.10 (release Date: 2013-06-30)