to clarify the issue that I'm currently having, here are the current settings in the Sidebar Instant App
This configuration results in the legend, popup and other elements appearing at the bottom of the map when the app is published, rather than the desired location on the left of the map
The examples that I see in the Instant Apps Gallery have the sidebar on the left hand side, and I'm scratching my head as to where these settings might be if they're not those that I've shown above
thankyou