Man pages matching name bread::board::lifecycle::singleton in section 3pm:

Bread::Board::LifeCycle::Singleton.3pm.en	debian 10 / libbread-board-perl
Bread::Board::LifeCycle::Singleton.3pm.en	debian 11 / libbread-board-perl
Bread::Board::LifeCycle::Singleton.3pm.en	debian 12 / libbread-board-perl