default or selected kernelversion does not have config value CONFIG_CRYPTO_BENCHMARK.
Result is shown for kernelversion 6.16-rc7

Crypto benchmarking module

modulename: tcrypt.ko

configname: CONFIG_CRYPTO_BENCHMARK

Linux Kernel Configuration
└─>Cryptographic API
└─>Crypto core or helper
└─>Crypto benchmarking module
In linux kernel since version 6.1.145 (release Date: 2025-07-14)  
Quick & dirty crypto benchmarking module.

This is mainly intended for use by people developing cryptographic
algorithms in the kernel. It should not be enabled in production
kernels.

source code:

depends
CONFIG_CRYPTO
CONFIG_EXPERT or CONFIG_MODULES