CONFIG_X86_X32_ABI is not available for thedefaultarchitecture x86.
Result is shown for architecture 64BIT

x32 ABI for 64-bit mode

modulename: syscall_x32.ko

configname: CONFIG_X86_X32_ABI

Linux Kernel Configuration
└─>Binary Emulations
└─>x32 ABI for 64-bit mode
In linux kernel since version 4.14.326 (release Date: 2023-09-23)  
Include code to run binaries for the x32 native 32-bit ABI
for 64-bit processors. An x32 process gets access to the
full 64-bit register file and wide data path while leaving
pointers at 32 bits for smaller memory footprint.

depends
CONFIG_X86_64
CONFIG_success