Compact pickups work by combining a passenger cabin and cargo bed with systems that produce motion, support weight, steer, and stop. Their smaller package can provide useful hauling without the dimensions of a larger truck, but it still relies on the whole vehicle operating within its designed limits.
Compact is a size description, not one mechanical formula. Construction, engine or hybrid arrangement, driven wheels, suspension, and towing equipment vary by model. Understanding those systems explains why a vehicle can feel easy to drive yet still need careful attention to cargo weight, tire condition, and the equipment required for a trailer.