Man pages matching name www::mechanize::gzip in section 3pm:

WWW::Mechanize::GZip.3pm.en	debian 10 / libwww-mechanize-gzip-perl
WWW::Mechanize::GZip.3pm.en	debian 11 / libwww-mechanize-gzip-perl
WWW::Mechanize::GZip.3pm.en	debian 12 / libwww-mechanize-gzip-perl