There are lots of theories of how the moon was formed, and one is essential that there were two proto-moons that collided and that the one basically spread out onto the back of the other (ELI5 version there), which is why the backside looks different and is different in thickness and composition.
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Nope. Not possible. even if we point Hubble ( or in the future, the James Webb space telescope) directly on the rover tracks we can’t see them. A single pixel in the highest resolution of a Hubble foto is about 70 meters wide at the surface of the moon
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