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.
Comments
Google Duo was rebranded into Google Meet.
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.