How to access prototype's properties in Java Script with ES6 class?

I have been looking for a while for an answer and never found one. Thought I'd post my question here.

In Java Script, when we create an object constructor like so:

function Car(speed){
  this.speed = speed;
  this.position = 0;
}

Car.prototype.move = function(){
  this.position++
}

then we can access the prototype's properties like so:

console.log(Car.prototype)
// will output: Car { move: [Function] }

But when we declare the Car constructor like so (with ES6 classes)

class Car{
  constructor(speed) {
   this.speed = speed;
   this.position = 0;
  }

  move(){
    this.position++:
  }
}

then strangely when we do this we get an empty object:

console.log(Car.prototype)
// will output: Car { }

From what I read, all properties declared in a ES6 class outside of the constructor method are assigned on the prototype of the object. So why can't we access the properties of the prototype using console.log(Car.prototype)?

I also know it is part of the prototype because when I do this, it works:

console.log(Object.getOwnPropertyNames(Car.prototype));
// output [ 'constructor', 'move' ]

So I know the move method is assigned to the prototype.

I just wonder why can't we access those properties using Objet.prototype like when we declare the constructor in a function instead of in a ES6 class?

Did I missed something, is this a bug?

I'm working in Node.js, if this information might be helpful