Having same issue. Activated phone 8/1/2019. Been getting this notification on a regular basis. It goes away. But always comes back and hangs around for a while. I searched Settings for "Wizard", and found two. One was "Samsung Setup Wizard". The other was labeled "Setup Wizard". I "Force Stopped" the "Setup Wizard" (and verified the notification had disappeared), and then restarted the phone. Notification is currently gone. We'll see if it comes back.
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