Use back button on phone to go to previous page (single page app)

I’ve never tried it on a mobile app but on desktop, I have used the browser plugin and use the change URL workflow action. You place the browser element on your page and then you can access the change URL function in workflows. This modifies the browser history so that when a user clicks the back button they go to the previous URL. If you use URL variables you can show/hide groups on your single-page app with conditions.