Man pages matching name pdl::graphics::pgplotoptions in section 3pm:

PDL::Graphics::PGPLOTOptions.3pm.en	debian 10 / pdl
PDL::Graphics::PGPLOTOptions.3pm.en	debian 12 / pdl
PDL::Graphics::PGPLOTOptions.3pm.en	debian 13 / libpgplot-perl