Man pages matching name crypt::mac::blake2s in section 3pm:

Crypt::Mac::BLAKE2s.3pm.en	debian 10 / libcryptx-perl
Crypt::Mac::BLAKE2s.3pm.en	debian 11 / libcryptx-perl
Crypt::Mac::BLAKE2s.3pm.en	debian 12 / libcryptx-perl