@nnyl 

Hi,
The Tapo C402 is a battery-powered camera. To conserve power, battery-powered cameras typically remain in a low-power sleep state and can only detect and record motion when awake. The camera can be awakened by actions within the app, such as viewing the camera's live feed, or by the PIR sensor. You can refer to the instructions below to learn how to wake up the C402.
What is the Wake-up Sensitivity of my battery camera/doorbell?
 

In your situation, it may be that the camera does not wake up by the event occurs in the garage, so no video is recorded. This is related to several factors, such as camera settings, installation position, environment, and the person's movement trajectory. It's recommended to troubleshoot by following the instructions below.

  1. Please note that due to the mechanism of the camera's PIR sensors, the objects moving directly towards the camera may not be detected to some extent.

  2. Please refer to the instructions below to test the camera's detection range, and ensure the person moves within the detection range.
      How to test the detection range of the Tapo battery camera 

  3. You can refer to Part 2 in the following instructions to troubleshoot: What to do if the Detection feature is not working on the TP-Link Camera?

If the same phenomenon persists, it's recommended to email our technical support team with the following information for further assistance.
  1. A description of the phenomenon you are experiencing.

  2. The screenshots of the camera's detection, detection zone, wake-up settings, and enabled detection types pages.
  3. You can record a video on the camera's live view page manually, showing the person who can't be recorded when walking around the garage.

Best Regards