CONFIG_TOOLCHAIN_HAS_ZBB is not available for thedefaultarchitecture x86.
Result is shown for architecture riscv

CONFIG_TOOLCHAIN_HAS_ZBB (not configurable)

configname: CONFIG_TOOLCHAIN_HAS_ZBB

Linux Kernel Configuration
└─>Platform type
└─>TOOLCHAIN_HAS_ZBB
In linux kernel since version 6.3 (release Date: 2023-04-23)  
depends
CONFIG_AS_HAS_OPTION_ARCH
CONFIG_LD_VERSIONCONFIG_23900 or CONFIG_LLD_VERSIONCONFIG_150000
CONFIG_cc-option or  NOT CONFIG_32BIT
CONFIG_cc-option or  NOT CONFIG_64BIT