Man pages matching name poe::component::client::keepalive in section 3pm:

POE::Component::Client::Keepalive.3pm.en	debian 10 / libpoe-component-client-keepalive-perl
POE::Component::Client::Keepalive.3pm.en	debian 11 / libpoe-component-client-keepalive-perl
POE::Component::Client::Keepalive.3pm.en	debian 12 / libpoe-component-client-keepalive-perl