No data in Behavior Flow for iOS app
I cannot view any data in the Behavior Flow section for my iOS app. I set up tracking 2 months ago and the Behavior Flow section has always looked like this. See screenshot.
I only want to view pathing between Events. The Events are set up and recording properly. There have been hundreds of thousands of sessions in this time frame, so there should be sufficient data to pull from. There is a GA document for mobile apps which states that Events paths are automatically tracked in the Behavior Flow section: https://support.google.com/analytics/answer/2568878?hl=en
I'm seeing that I don't have any data for screens so maybe that could be the problem? Do I need data for screens to view the behavior flow, even though I only want to view paths between events? If so, how do I set that up? I thought screen tracking was set up automatically.