Is the desk facing the door facing Feng Shui?

There should be no problem. It should be noted that sitting next to the back window is "empty" and looking at the window is "empty", both of which are bad in ancient geomantic omen. It's easy to sit empty, with no foundation in career, vain work, no promotion, and short career and study. Looking up to the sky is easy to be distracted, unwilling to study and career, impetuous, and not practical. It is recommended that the desk turn right 90 degrees or 45 degrees. In short, there should be a solid wall behind it. I hope it helps you.