default or selected kernelversion does not have config value CONFIG_ARCH_HAS_EXECMEM_ROX.
Result is shown for kernelversion 6.6.75

CONFIG_ARCH_HAS_EXECMEM_ROX (not configurable)

configname: CONFIG_ARCH_HAS_EXECMEM_ROX

Linux Kernel Configuration
└─>General architecture-dependent options
└─>ARCH_HAS_EXECMEM_ROX
In linux kernel since version 6.13 (release Date: 2025-01-19)  
For architectures that support allocations of executable memory
with read-only execute permissions. Architecture must implement
execmem_fill_trapping_insns() callback to enable this.