I'd say that incredibly unlikely unless an LLM suddenly blurts out Tesla's entire self-driving codebase.
The code itself is probably among the least behind-a-moat things in software development, that's why so many big players are fine with open sourcing their stuff.
On the other hand they blatantly reskinned an entire existing game, and there's a whole breach of contract aspect there since apparently they were reusing their own code that they wrote while working for Bethesda, who I doubt would've cared as much if this were only about an LLM-snippet length of code.