Google Duo and Google Meet mergence has been very confusing for everyone involved. Once the merger is finished, the old Meet app will be phased out and what used to be Duo app will become Meet. Google Meet branding came to Duo app few weeks ago. This change is proving to be hard to handle for some Duo fans, because Google has brought back the old icon of Duo.
The latest update has brought back familiar blue launcher icon. It coexists with new four color Meet icon that was added but by tapping on either icon leads to same app being opened. Google has said that it made the decision in order to help the people who keep searching for Duo and can not find the app because the name has been changed. When you tap the Duo icon, the new Google Meet experience complete with splash screen that tells the transition in detail still shows up. The icon in original Meet app is still green, serving visual indicator that it will be phased out down. The icon of Duo should finally see it demise in few weeks or months once everyone is aware of the new merged experience.