Man pages matching name net::server::ss::prefork in section 3pm:

Net::Server::SS::PreFork.3pm.en	debian 10 / libnet-server-ss-prefork-perl
Net::Server::SS::PreFork.3pm.en	debian 11 / libnet-server-ss-prefork-perl
Net::Server::SS::PreFork.3pm.en	debian 12 / libnet-server-ss-prefork-perl