G502 Proteus Spectrum missing G4 and G5 buttons in G Hub : r/LogitechG
Don't. Just don't. G502 HERO firmware update through G HUB is broken. Waited for over 1.5h with the mouse "updating" and not working, and at the end had to disconnect and reconnect
Logitech G Hub and Gaming Software Guide - How to use - TheGamingSetup