Man pages matching name probe::signal.send_sig_queue in section 3stap:

probe::signal.send_sig_queue.3stap.en	debian 10 / systemtap-doc
probe::signal.send_sig_queue.3stap.en	debian 11 / systemtap-doc
probe::signal.send_sig_queue.3stap.en	debian 12 / systemtap-doc