"Lunar" is an adjective, a descriptive word, not a noun.
It also doesn't have to apply to Earth's moon, but could apply to the moon of any planet.
By the way, and this is for nx1701g
When did the writers say that later characters are still intact in the movie's universe/tiimeline?
Can you provide a link?
The closest any of us heard is that the original timeline still exists and hasn't been erased.