CONFIG_CRYPTO_CURVE25519_NEON is not available for the selected architecture x86.
Result is shown for architecture arm

CONFIG_CRYPTO_CURVE25519_NEON (not configurable)

modulename: curve25519-neon.ko

configname: CONFIG_CRYPTO_CURVE25519_NEON

Linux Kernel Configuration
└─>Accelerated Cryptographic Algorithms for CPU (arm)
└─>CRYPTO_CURVE25519_NEON
In linux kernel since version 4.14.326 (release Date: 2023-09-23)
Curve25519 algorithm

Architecture: arm with
- NEON (Advanced SIMD) extensions
source code: