Man pages matching name auth::yubikey_decrypter in section 3pm:

Auth::Yubikey_Decrypter.3pm.en	debian 10 / libauth-yubikey-decrypter-perl
Auth::Yubikey_Decrypter.3pm.en	debian 11 / libauth-yubikey-decrypter-perl
Auth::Yubikey_Decrypter.3pm.en	debian 12 / libauth-yubikey-decrypter-perl