default or selected kernelversion does not have config value CONFIG_LIBCRC32C.
Result is shown for kernelversion 6.9.9

CRC32c (Castagnoli, et al) Cyclic Redundancy-Check

modulename: libcrc32c.ko

configname: CONFIG_LIBCRC32C

Linux Kernel Configuration
└─>Library routines
└─>CRC32c (Castagnoli, et al) Cyclic Redundancy-Check
In linux kernel since version 2.6.12  
This option is provided for the case where no in-kernel-tree
modules require CRC32c functions, but a module built outside the
kernel tree does. Such modules that use library CRC32c functions
require M here. See Castagnoli93.
Module will be libcrc32c.

source code:
lib/libcrc32c.c