You can buy a lot of Cat scale tickets for that. It definitely wouldn't be able to give you axle weights. I'm assuming it estimates the trailer weight by the engine load percentage.
2017 Eagle 293RKDS, factory ordered, lots of mods and upgrades.
2018 Ram 3500 crew cab long bed SRW diesel 6spd Aisin 4wd Tradesman.
B&W Ram puck 5th wheel
Mopar wheel to wheel steps