Is there any way to upload a single profile with a single plate that lets someone choose to print in either PLA or PETG (or any other filament desired) directly from the mobile app? As far as I can tell, the only way to do this now is to provide separate print profiles or plates for the various materials you want to support printing from the app.
In the app you have ability to change the filament type (if you have an AMS), just select another slot.