Samsung turned the power button into a Bixby key on the Samsung Galaxy Note 10, which makes powering off and rebooting method different. When you long-press the power key, Bixby(Samsung’s Voice assistant) comes up by default.
There are two ways, to bring the “Power Off”, “Restart”, and “Emergency Mode” i.e. Power menu, which is listed below:
1. Using Physical Buttons
To have the power menu using physical buttons on Galaxy Note 10, press and hold the power button and volume down key. Hold both keys for a second, then the power menu will appear on the screen.
2. Using Quick Settings
To open the Quick Setting, swipe down from the top of the screen, then tap on the power icon next to the settings gear to have the power menu, then choose the option you want.