Any IAM button click can be tracked as Button 1 or Button 2 in Braze:

1. In your in-app message edit page, click on the button you want to track
2. At the end of the button's deeplink/link, add:
   1. ?abButtonId=0 to track this button as button 1
   2. ?abButtonId=1 to track this button as button 2
3. Submit your button
4. Submit your in-app message
5. Paste or repaste your in-app message HTML in Braze
6. That's it ✔️

→ This technique doesn't work with multi-screen IAMs. Use surveys to track multi-screen IAM button clicks.