Always check your manual. There are many reason, usually legal that would keep a company from providing a tow rating.
The biggest reason are, adequacy of the brakes
, the transmission and drive line components. risking getting flamed here, but most FWD drive trains are shared across many models and lines with in the same brand, even between engines.
Stresses on the subframes could also be a reason a the built in fail points for collisions. A class 2 is light
duty hitch for things like bike racks and cargo carriers.