The G40B supports direct firmware updates via the USB port, but you can also do it through the OSD (On-Screen Display) if you have network connectivity, or via the Samsung Odyssey controller app if applicable.
If you see nothing under “Drivers” or “Firmware” — that’s normal. Samsung doesn’t always release updates unless necessary. samsung odyssey g40b drivers upd
Here’s a solid, technical write-up regarding driver updates for the (model code: LS27BG40x, LS25BG40x). The G40B supports direct firmware updates via the
Improving stability with NVIDIA G-Sync and AMD FreeSync Premium. samsung odyssey g40b drivers upd