@Tmp5362 

Hi,
If you have enabled the Notifications feature all the time on your camera's Device Settings page, on the Tapo app>Home page, please tap the Bell icon at the top right corner>click on the Tapo C520WS, and then check if you received detection notifications during the daytime.

If not, it may be the Detection features are disabled during the daytime. Please confirm if you have tapped the Home mode or Away mode on the Tapo app>Cameras tab before the camera does not detects events.
And check if you have enabled the detection feature on the Home or Away mode for your camera.
How to edit Home and Away Mode for Tapo&Kasa Cameras on the Tapo app?
 

Best Regards