Once again...
Tdu2 has nice graphics (for the time at least) a bunch of nice ideas and Ibiza, set of charming Mediterranean landscapes.
But not enough to make forget those awful handling and physics engine.
As already said, game physics are not in moddable files, this is mostly source code, that only game developers have and can understand. Such people are making this for a living, and can't give time and copyrighted content to free time modders. Besides, I think most Eden game developers have switched to other projects, and most obviously, to better opportunities.
Instead of complaining, why one would not help remaining modders ?? Better spend time and energy for this...
I truly believe tdu2 modding is great already. Just this game lacked the opportunity to seduce me. That's life