default or selected kernelversion does not have config value CONFIG_HAVE_FUNCTION_GRAPH_FREGS.
Result is shown for kernelversion 6.6.78
CONFIG_HAVE_FUNCTION_GRAPH_FREGS (not configurable)
configname: CONFIG_HAVE_FUNCTION_GRAPH_FREGS
Linux Kernel Configuration
└─>Kernel hacking
└─>HAVE_FUNCTION_GRAPH_FREGS