For some reason, the Pixel 2 and Pixel 2 XL pack a hidden button that will activate menus on the phone. That’s a great throwback feature to the way Android’s navigation bar used to work.

Google is working on a new corner swipe gesture that lets you invoke the default assistant when using three-button navigation ...

With your Samsung Galaxy S10, you have the option of using gestures for navigation instead of the traditional buttons at the bottom of the screen - but this capability isn't turned on by default.