Hi Stef, there's nothing wrong with your drawing, it's perfectly done in its technical aspects, but I was surprised to see an overly mechanical copy of my samples. I expected to see your own interpretation following the rules you already know.
The goal of this lesson was to make you aware of why some perspectives look distorted and to enable you to see where the problem is and how to fix it.
To do this, I have divided this lesson into three parts:

The first is to show a wrong perspective. For that, I drew three cubes to show the result of using vanishing points very close to each other. This was an example of what NOT TO DO.

In the second part, I show you a way to define the distance of the vanishing points to avoid this mistake, this is by using an imaginary projection of the top view of a cube located at the bottom of the page.

In the third part of this lesson, I invite you to make just the right drawing. I didn't go through the process step by step because I assume that if you are at this stage of the class you are already able to do the drawing by yourself.

Finally, I showed you an overlay of the two drawings ONLY aimed to you can appreciate the difference in results for the same cubes at identical positions, height, and depth.

I expected from you the development of the third part of the lesson.
I hope you will show me your artistic progress. Have you tried other situations? Other variations? I would like to observe your progress or your mistakes doing your own exercises.

PS: I visited the Pantheon today, it's fantastic!