Man pages matching name tap::parser::sourcehandler::pgtap in section 3pm:

TAP::Parser::SourceHandler::pgTAP.3pm.en	debian 10 / libtap-parser-sourcehandler-pgtap-perl
TAP::Parser::SourceHandler::pgTAP.3pm.en	debian 11 / libtap-parser-sourcehandler-pgtap-perl
TAP::Parser::SourceHandler::pgTAP.3pm.en	debian 12 / libtap-parser-sourcehandler-pgtap-perl