Man pages matching name crypt::digest::blake2b_512 in section 3pm:

Crypt::Digest::BLAKE2b_512.3pm.en	debian 10 / libcryptx-perl
Crypt::Digest::BLAKE2b_512.3pm.en	debian 11 / libcryptx-perl
Crypt::Digest::BLAKE2b_512.3pm.en	debian 12 / libcryptx-perl