@walkerx: That's an interesting one. On your Tab S6, do you have Do Not Disturb scheduled for a certain period of the day? If so, head to Settings > Notifications > Do Not Disturb > Hide Notifications, and toggle off any options here. Go back to the Notifications settings > Advanced Settings > Notification Reminders, and toggle this off if applicable. If you have the same accounts (Google, Samsung etc) linked to both your S20 FE and Tab S6 then it's normal to receive the same notifications on both devices, especially if you haven't actioned them.