You can adjust the sensitivity of the sensing itself. Open the Automation tab, and head to the SpaceSense menu. Select the room you want to adjust, and you will find a sensitivity slider. Increase the sensitivity if SpaceSense seems to not pick up motion sometimes. Decrease it if you experience false positive detections, or for example if you don’t want your pets to trigger the lights.

Aside from the sensitivity, you can configure the behavior of the lights when motion is detected, and when it stops, as well as how long it takes for lights to act when motion stops and how long manual override should be (letting you control the lights instead of the automation).
By default, the behavior is set to ON and OFF, but you can choose instead any of the WiZ light modes, whites or colors. You may also just specify a brightness level, regardless of which mode lights will be using at the time.