Detection problem / 5 minutes and my theory!

In order to see the street and not have cars trigger the motion you could try using Detection Zones under; device settings, detection settings, detection zone

To get around the 5 min cool down between motion notifications you could use a Wyze motion sensor, this would create some redundancies with motion detection, but you could disable the notification for the camera and rely on the sensor

Here is a spot to vote for the ability to adjust the 5 min cool down, would probably end up being a subscription service: