Anyway, screen flash notifications might be your option. Setting > Accessibility > Advance setting.
Sorry to hear that, Jamsanity, about your disappointment on your newly bought Samsung Galaxy A33 5G expecting it to have an Always O Display and wake-up options in notifications and we apologize for the inconvenience it caused you.
As an alternative, you may please follow the steps provided to get notified via flashlight on selected apps.
Step 1. Open the Settings on the device.
Step 2. Scroll down and select Accessibility.
Step 3. Tap Advanced Settings then select Flash notification.
Step 4. Tap Camera flash notification. You may also choose Screen flash notification.
Step 5. Enable Camera flash notification.
Step 6. You can enable flash notifications for selected apps.
For more assistance, you may contact us on our online Samsung support channels below.