Man pages matching name anyevent::io::ioaio in section 3pm:

AnyEvent::IO::IOAIO.3pm.en	debian 10 / libanyevent-perl
AnyEvent::IO::IOAIO.3pm.en	debian 11 / libanyevent-perl
AnyEvent::IO::IOAIO.3pm.en	debian 12 / libanyevent-perl