In the axure share app, the sidebar will not show when prototypes are opened through the app. This used to not be an issue. Even when opening older prototypes it’s gone. This makes it a pain to switch screens quickly
It sounds like you’re viewing your prototype through the Axure Share mobile app is that correct? If so, one way you can switch pages is to bring up the sitemap by triple-tapping the screen. Alternatively, if you would like to view your prototype with a sidebar, you can visit the hosted prototype via a web-browser on your mobile device.
I hope this helps!