CONFIG_ARCH_NUC93X is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
default or selected kernelversion does not have config value CONFIG_ARCH_NUC93X.
Result is shown for kernelversion 6.2.5

Nuvoton NUC93X CPU

configname: CONFIG_ARCH_NUC93X

ARM system type
└─>Nuvoton NUC93X CPU
In linux kernel since version 2.6.34 (release Date: 2010-05-16)  
Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
low-power and high performance MPEG-4/JPEG multimedia controller chip.