If the tardigrades can (were able after the crash) to get below the surface, their ability to survive may be even longer than most scientists think possible (more than ten years in a dehydrated suspended life state).
Given that this happened, there is legitimate reason to believe even snaller single-celled forms, like some bacteria, could survive not only extreme temperatures but radiation in the near vacuum of space, like on the moon’s surface. And were there any such life forms on the crashed moon lander?
However all life forms need some source of “food”, usually something else that is biologic, in order to LIVE. What that can be on the moon is unknown I think, if anything.
here is maybe an answer to the bacteria question.
https://www.ck12.org/biology/bacteria-nutrition/lesson/Bacteria-Nutrition-MS-LS/
Spores from Space!
Yep, saw a movie about that about a zillion times.
Time for a Hollywierd remake...The Andromeda Moon.
Of course with all transexual lesbian moon maids.
The crew from Apollo 12 brought back some components of the nearby Surveyor 3 lander. The camera has some bacteria spores that survived.