Device does not appear in G HUB If some features of G HUB do not appear to work correctly and restarting doesn't help, try
Logitech G635 "inactive" in G Hub : r/LogitechG
Logitech G635 7.1 LIGHTSYNC Gaming Headset
Logitech G635 Gaming Headset Black | Techinn
Amazon.com: 3.5mm Audio Cable for Logitech G635 Gaming Headset/Xbox One/ PS4 and Logitech G Pro,G Pro X,G633,G933,G433 Gaming Headset (Upgraded) : Video Games
Logitech G633S/G635 showing not connected to G HUB when plugged in : r/LogitechG