default or selected kernelversion does not have config value CONFIG_HAVE_HARDENED_USERCOPY_ALLOCATOR.
Result is shown for kernelversion 6.9.9

CONFIG_HAVE_HARDENED_USERCOPY_ALLOCATOR (not configurable)

configname: CONFIG_HAVE_HARDENED_USERCOPY_ALLOCATOR

Linux Kernel Configuration
└─>Security options
└─>HAVE_HARDENED_USERCOPY_ALLOCATOR
In linux kernel since version 4.1 (release Date: 2015-06-21)  
The heap allocator implements __check_heap_object() for
validating memory ranges against heap object sizes in
support of CONFIG_HARDENED_USERCOPY.

is depended by
CONFIG_SLAB