Man pages matching name data::stag::xslhandler in section 3pm:

Data::Stag::XSLHandler.3pm.en	debian 10 / libdata-stag-perl
Data::Stag::XSLHandler.3pm.en	debian 11 / libdata-stag-perl
Data::Stag::XSLHandler.3pm.en	debian 12 / libdata-stag-perl