Man pages matching name test2::asyncsubtest::event::attach in section 3pm:

Test2::AsyncSubtest::Event::Attach.3pm.en	debian 10 / libtest2-suite-perl
Test2::AsyncSubtest::Event::Attach.3pm.en	debian 11 / libtest2-suite-perl
Test2::AsyncSubtest::Event::Attach.3pm.en	debian 12 / libtest2-suite-perl