ReactJS + NextJS – How to pass props from _app.js to page?

I just switched from ReactJS to NextJS and I can’t find how to pass props from _app.js to a page.

I’m trying to call a function in _app.js from a different page. In ReactJS it was straight forward, since you had to make your own Router, you could just pass props from App.js down to the pages. Now in NextJS I’m not explicitly calling the page, so I can’t pass the props anywhere.

What is the way to do it in NextJS?