NavigatorBackButton 
Edit
This feature is still experimental. “Experimental” means this is an early implementation subject to drastic and breaking changes.
The NavigatorBackButton component can be used to navigate to a screen and should be used in combination with the NavigatorProvider, the NavigatorScreen and the NavigatorButton components (or the useNavigator hook).
Usage
Refer to the NavigatorProvider component for a usage example.
Inherited props
NavigatorBackButton also inherits all of the Button props, except for href and target.