macOS requires the "Screen Recording" permission to be enabled for DisplayLink Manager in order to function. While no actual recording or observation occurs, macOS interprets the DisplayLink-based docking station or USB graphics adapter as actively "observing" the screen.

By default, macOS suppresses notifications when the screen is being "shared." This means that when a DisplayLink-based product is in use, notifications may not appear.

How to enable notifications while using a DisplayLink-based product:

1. Open System Settings on your Mac.
2. Go to Notifications on the left side of the window
3. Click the toggle to enable Allow notifications when mirroring or sharing the display.

This will allow notifications to appear as usual while your DisplayLink-based docking station or USB graphics adapter is connected. Note: this also enables notifications to appear when the screen is being shared or observed.