I found one while flying in the beta test phase that was beautifully rendered.
Since, I have tried searching for others. Mojave, is there, but no boneyard around it. Another one, Pinal in Arizona is there but no aircraft around it.
I think it would be really true to life for Microsoft to include these, for they have them in the real world, It would be a fun idea too for Microsoft to have a “Final Flight” activity when they retire the 747. That would be a fun but sad time, bringing the Queen of the Skies to her resting place.