Man pages matching name cgi::parse::psgi in section 3pm:

CGI::Parse::PSGI.3pm.en	debian 10 / libcgi-emulate-psgi-perl
CGI::Parse::PSGI.3pm.en	debian 11 / libcgi-emulate-psgi-perl
CGI::Parse::PSGI.3pm.en	debian 12 / libcgi-emulate-psgi-perl