Why doesn't Asp.Net Core want to bind data from Angular form?

I form data into a form for angular like this:

const formDate = new FormData();
formDate.append("restaurant", JSON.stringify(this.restaurant));
formDate.append("file", this.file[0], this.file[0].name);

I can see through the developer panel in the browser that the form is submitting the correct data:

But the controller accepts such data, and the file arrives normally:

Controller:

  [HttpPost, DisableRequestSizeLimit]
  public IActionResult Post([FromForm]Restaurant restaurant, [FromForm]IFormFile file)
  {
    code...
  }