CONFIG_ARCH_APPLE is not available for thedefaultarchitecture x86.
Result is shown for architecture arm64

Apple Silicon SoC family

configname: CONFIG_ARCH_APPLE

Linux Kernel Configuration
└─>Platform selection
└─>Apple Silicon SoC family
In linux kernel since version 4.14.326 (release Date: 2023-09-23)  
This enables support for Apple's in-house ARM SoC family, starting
with the Apple M1.