CONFIG_ACPI_SRAT is not available for thedefaultarchitecture x86.
Result is shown for architecture i386
default or selected kernelversion does not have config value CONFIG_ACPI_SRAT.
Result is shown for kernelversion 5.4.123

CONFIG_ACPI_SRAT (not configurable)

modulename: srat.ko

configname: CONFIG_ACPI_SRAT

Linux Kernel Configuration
└─>Processor type and features
└─>ACPI_SRAT
In linux kernel since version 2.6.12  
source code:
arch/i386/kernel/srat.c