Official comment
The Mini 3 Pro is supported:
https://support.dronesmadeeasy.com/hc/en-us/articles/205704366-Supported-Hardware
https://support.dronesmadeeasy.com/hc/en-us/articles/16460429175188-Mini-3-and-Mini-3-Pro-Support
You do need to install a version of the app that is not available in the Play Store though. Make sure you use the 'e' variant of the APK file from here:
https://support.dronesmadeeasy.com/hc/en-us/articles/8160429529876-Installation
Comment actions