Man pages matching name bread::board::service::deferred::thunk in section 3pm:

Bread::Board::Service::Deferred::Thunk.3pm.en	debian 10 / libbread-board-perl
Bread::Board::Service::Deferred::Thunk.3pm.en	debian 11 / libbread-board-perl
Bread::Board::Service::Deferred::Thunk.3pm.en	debian 12 / libbread-board-perl