Man pages matching name net::imap::client::msgsummary in section 3pm:

Net::IMAP::Client::MsgSummary.3pm.en	debian 10 / libnet-imap-client-perl
Net::IMAP::Client::MsgSummary.3pm.en	debian 11 / libnet-imap-client-perl
Net::IMAP::Client::MsgSummary.3pm.en	debian 12 / libnet-imap-client-perl