Myth: There is a Dark side of the Moon
Reality: This confusion is due to tidal locking, which makes it seem as if the moon isn’t rotating. The moon actually is spinning quite slowly, completing a rotation in about the amount of time it takes it to make a revolution around Earth. While one side (more or less) is forever shielded from Earth, that has nothing to do with the amount of sunlight it receives. After all, we do have different phases of the moon.
Source: https://www.iflscience.com/health-and-medicine/common-science-myths-most-people-believe/