All designs are for the maximum specification, plus whatever the product team (which includes lawyers, service, regulatory, etc reps) decides and the final decision is upper management paying for the product development
That then boils down to the worst case that product is expected to experience and survive. Toss in service/warranty into that fray
Survive as in lasting long enough to make it past the warranty, plus a bit...ability to manhandle the situation during a Mr Murphy encounter...etc
Back to the OP's ask...'can'...sure most anything 'can', but the real question is for how long and safely
Going over any rating won't have the thing destruct instantly at that transition...but it will sooner than later...
Personally never give 'sure you can' advice, but provide the metrics for the newbie (even oldies like me..71 years old) to make up their own minds in their risk management decision process(s)
Note that all 'half ton' Pickups/SUV/CUV's have rear GAWR in the 3,xxx lb to 4,xxx lb range. While the next higher class Pickups/SUVs has rear GAWR in the +6,xxx lb range...why ? Because most all of the added weight to any Pickup/SUV/CUV is behind the mid point of the wheel base. Just look at them all from the side and you'll find that the drivers door rear edge is about mid point.
Meaning the rear axle will carry most of the added weight. Be it people/pets/cargo/luggage/tongue/PIN/etc