First of all, I only use my iPad to ran Zwift for workouts and events.
Within the HUD, there is an option called “TOGGLE DATA GRAPHS” in the Action Bar. What does it actually hide or show on HUD? I tried to tab on it but does not seem do anything…
I found this 1st screenshot below in the forum, comparing to 2nd screenshot of what I have shown during ride…
I’m afraid the top screenshot is a mock-up made by a Zwifter to show what they would like to have in the game.
At the moment, everyone gets what you have in the second screenshot.
Toggle data graphs is the power and heart rate data (a little over 10 minutes worth) that appears (or not, if you switch it off) at the very bottom of the screen.