Note that the Moon must be closer to the "camera" though as it should be much further away from Earth.
I was going to bitch about that, but yeah, obviously the only moment the 'real' distance would show is when the Earth and Luna are in a parallel state to the camera lens.
It's curious this is the first time afaik they made the shot composition though.
Also, on Phobos and Deimos: they are likely captured objects and not co-created moons, as far as those may exist at all (since the formation stage and beyond is messy, and the 'order' we observe is based on not understanding the scale of time).
There was a recent Bill Nye vid with "why don't gas giants have gas moons?" asked by a five year old. Somehow, in 30+ years, I had never thought of that.