Where can I find calendar reminders?
Calendar reminders appear in your Activity room, which is shown in your sidebar by default. If you removed it from there, you can reopen it by clicking “…” next to the Pins section, then Activity.
To see an unread count on your app icon badge, make sure to check Include in badge count. And if you want the Activity room to not only display an unread count in the Pins sidebar section, you can also Watch it. This way, it will show directly in your Inbox.