Target Android Oreo and make use of the adaptive icons API
The app should be updated to target Android 8.0 Oreo to enable the improved notification controls such as notification channels and to use the adaptive icons API to improve coherency on user devices. The square icons are not appropriate for the Android ecosystem.
I see the icon is now adaptive, but not a very nice adaptive icon. I would describe the current icon as:
White Teams logo on a square purple plate on an adaptive white plate.
This would look much more professional as:
White Teams logo on an adaptive purple plate.
For examples of how this looks, see:
Microsoft To-Do app
Google Duo app
All these use adaptive icons as they were intended, and look much more professional and native as a result.
David Harper commented
Agreed. The icon looks a out of place on Oreo devices.
Jonathan Dick commented
This should be a really easy win. Please ping myself or anyone else on the xamarin team if you'd like some help!