Man pages matching name ipc::shareable::sharedmem in section 3pm:

IPC::Shareable::SharedMem.3pm.en	debian 10 / libipc-shareable-perl
IPC::Shareable::SharedMem.3pm.en	debian 11 / libipc-shareable-perl
IPC::Shareable::SharedMem.3pm.en	debian 12 / libipc-shareable-perl