Man pages matching name monkey::patch::action in section 3pm:

Monkey::Patch::Action.3pm.en	debian 10 / libmonkey-patch-action-perl
Monkey::Patch::Action.3pm.en	debian 11 / libmonkey-patch-action-perl
Monkey::Patch::Action.3pm.en	debian 12 / libmonkey-patch-action-perl