CONFIG_ARCH_H720X is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
default or selected kernelversion does not have config value CONFIG_ARCH_H720X.
Result is shown for kernelversion 6.2.5

Hynix HMS720x-based

configname: CONFIG_ARCH_H720X

ARM system type
└─>Hynix HMS720x-based
In linux kernel since version 2.6.12  
This enables support for systems based on the Hynix HMS720x