Is it really discontinued yet? If anything it's an ongoing naming blunder with no end in sight.
There are two products called Google Meet now. The web interface for the former Google Duo is duo.google.com, just rebranded to Google Meet. The former Google Meet still exists on meet.google.com. Both also have their own Android apps - one called Meet and other Meet (original). Both products have a different set of features and neither completely replaces the other.
The original Duo app was named "Meet (original)" on Android phones, but the old Duo icon remained until you launched the app (so it could inform you about the name change). Then the Google Meet app was introduced. This resulted in phones having three icons ("Duo", "Meet", "Meet (original)") for the same service.
