default or selected kernelversion does not have config value CONFIG_PAGE_SIZE_LESS_THAN_256KB.
Result is shown for kernelversion 6.9.9
CONFIG_PAGE_SIZE_LESS_THAN_256KB (not configurable)
configname: CONFIG_PAGE_SIZE_LESS_THAN_256KB
Linux Kernel Configuration
└─>General architecture-dependent options
└─>PAGE_SIZE_LESS_THAN_256KB