Man pages matching name bio::seqfeature::gene::poly_a_site in section 3pm:

Bio::SeqFeature::Gene::Poly_A_site.3pm.en	debian 10 / libbio-perl-perl
Bio::SeqFeature::Gene::Poly_A_site.3pm.en	debian 11 / libbio-perl-perl
Bio::SeqFeature::Gene::Poly_A_site.3pm.en	debian 12 / libbio-perl-perl