Man pages matching name anyevent::fcgi::connection in section 3pm:

AnyEvent::FCGI::Connection.3pm.en	debian 10 / libanyevent-fcgi-perl
AnyEvent::FCGI::Connection.3pm.en	debian 11 / libanyevent-fcgi-perl
AnyEvent::FCGI::Connection.3pm.en	debian 12 / libanyevent-fcgi-perl