This feature is reported to be available to more users (I have it on beta). When you open a page from Google's discovery tab, you can swipe up from the bottom to see a sliding view with the "people also view" title.
To give it a try, open your Google app, scroll down through the discovery feed to any article. After opening a page, swipe up from the very bottom to see a new sliding menu. Normally it will have some results on the same topic from other resources but you might also see some reach search results from Google or a list of similar topics to explore. Did you get this feature too?