you will be able to have those settings, g-sync etc., if you connect an external monitor to the port that is directly wired to your nvidia card. it should be the usb c/thunderbolt with displayport.
how do you know if g-sync is working on the laptop internal display with adaptive sync feature since you can't enable it in nvidia control panel? my external monitor has a built in OSD feature to show real time refresh rate and i can compare that to the game's but not the internal display.