Will an observer on Mars see the Pole Star in the constellation M. Medveditsa and will it be a landmark?

Yes, he will, but the Polar Star in the constellation M. Medveditsa will no longer be a landmark. Constellations on Mars have exactly the same appearance as on Earth.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.