Man pages matching name crypt::digest::keccak384 in section 3pm:

Crypt::Digest::Keccak384.3pm.en	debian 10 / libcryptx-perl
Crypt::Digest::Keccak384.3pm.en	debian 11 / libcryptx-perl
Crypt::Digest::Keccak384.3pm.en	debian 12 / libcryptx-perl