Your trailer manufacturer does not have to use the axle rating from the axle manufacturer.
They are allowed to set the trailer’s GAWR below the actual axle rating to achieve the GVWR they desire for the unit.
In other words, the vehicle manufacturer may set the trailer’s GAWR to 5080# from 5200# axles. It is often seen when that manufacturer wants to use tires rated at 2540# for the unit.
Of course there are many other examples to use.
Look at your trailer's certification label for its certified GAWR.
FastEagle