Which menu bar are you talking about? It's not in Safari. Siri is in the right right. I have to go to system prefs to get to it.
To the right of Siri at the extreme right end of the menu bar at the top or your screen there is an icon that looks like a miniature version of the following:
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Click on that icon and a window appears with two tabs Today and Notifications. The left tab (Today) shows items such as Calendar, Weather, and Reminders. The right tab (Notifications) shows up to a week of notifications that you have received.
System Preferences > Notifications is where you specify the type of notification that each app can use icon badges, Banners, Alerts, Sounds when the notification occurs.
