As @HDRock mentioned, similar to the Wyze Cams the Wyze Sense is intended for indoor use. However, also similar to the Wyze Cams, many people go right ahead and use it outdoors anyway (with some protection).
The main issue I can see with using Wyze Sense outdoors is the battery. Coin cells are sensitive to temperature and corrode easily when exposed to moisture, so if used outdoors you would want to protect the sensor from extreme temperatures and precipitation.
Just be aware that using them outdoors likely voids the warranty. But if it’s worth $5 periodically (to replace one whenever it stops working) to keep tabs on something outside then go for it .