Man pages matching name evp_pkey_ctx_set_scrypt_n in section 3ssl:

EVP_PKEY_CTX_set_scrypt_N.3ssl.en	debian 10 / libssl-doc
EVP_PKEY_CTX_set_scrypt_N.3ssl.en	debian 11 / libssl-doc
EVP_PKEY_CTX_set_scrypt_N.3ssl.en	debian 12 / libssl-doc