I think that is probably the case. Not enough weight at the front so it does not steer.
However, I made a modern Super car the other day, with the 00s Mclaren/ferrari body. I also added a huge wing to the car and it does drive perfectly in BeamNG. So I am not so sure this is only linked to the Mid engine layout, since both cars are mid engined.
I will try to figure it out…