Nestle is a swiss company. They do business in the US, but that doesn't make them a US company anymore that Pepsico or Kraft-Heinz are European.
The US does have immense economic sway, but it's already difficult enough to craft and enforce laws punishing American companies for violating international and certain domestic laws overseas.
Laws controlling the actions of foreign companies doing business in the US who complied with local laws in a third country in a fashion that violates US dietary norms is going to be very difficult.