At default, there is no Hibernate option when clicking the Power button at Start menu in Windows 10. Only Sleep, Shutdown, and Restart.
But don't worry, you can show it with easy steps
To show Hibernate at Power Start menu :
1. Press Windows+R (to open Run Command)
2. Write powercfg.cpl at Run command column, then click OK or hit Enter key.
The Power Options window now appears
3. Click 'Choose what the power button does'
4. On the next window, click 'Change settings that are currently unavailable'
(to enable change settings).
5. Select/give a tick at Hibernate.
6.Click Save changes, to save setting.