Man pages matching name plack::handler::anyevent::fcgi in section 3pm:

Plack::Handler::AnyEvent::FCGI.3pm.en	debian 10 / libplack-handler-anyevent-fcgi-perl
Plack::Handler::AnyEvent::FCGI.3pm.en	debian 11 / libplack-handler-anyevent-fcgi-perl
Plack::Handler::AnyEvent::FCGI.3pm.en	debian 12 / libplack-handler-anyevent-fcgi-perl