Man pages matching name postfix::parse::mailq in section 3pm:

Postfix::Parse::Mailq.3pm.en	debian 10 / libpostfix-parse-mailq-perl
Postfix::Parse::Mailq.3pm.en	debian 11 / libpostfix-parse-mailq-perl
Postfix::Parse::Mailq.3pm.en	debian 12 / libpostfix-parse-mailq-perl