Man pages matching name bio::tools::signalp::extendedsignalp in section 3pm:

Bio::Tools::Signalp::ExtendedSignalp.3pm.en	debian 10 / libbio-perl-perl
Bio::Tools::Signalp::ExtendedSignalp.3pm.en	debian 11 / libbio-perl-perl
Bio::Tools::Signalp::ExtendedSignalp.3pm.en	debian 12 / libbio-perl-perl