Nobody says they “built a trailer”. Created, edited, made, maybe even “put together”. But not “built”. It technically works, but it’s still wrong.
*Thinking about it more, I’d bet the program mixed up the word for house trailer or something else physical. Build/built would track better for that.
The only thing having a native steam game gets you is the community submitted layouts for steam input, and you can get those pretty easily with some messing with game titles. Even without any of that, though, you can edit the controls to whatever you want.