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

CONFIG_HAVE_DYNAMIC_FTRACE_WITH_REGS (not configurable)

configname: CONFIG_HAVE_DYNAMIC_FTRACE_WITH_REGS

Linux Kernel Configuration
└─>Kernel hacking
└─>HAVE_DYNAMIC_FTRACE_WITH_REGS
In linux kernel since version 3.1 (release Date: 2011-10-24)