The dead end street that leads to the French Ministry in the film was still built, on the right side of the land, completely opposite of the British Ministry ride. If they wanted to, they could still create a new attraction entrance on that end, and set it within the French Ministry. But for now, only the exterior street outside of it will exist.
The entry to the British Ministry ride is a Floo station, like a train station. With fireplaces for public use, like Wizarding transit from Paris to London.