The motor needs to be replaced. A damaged bearing or bent motor shaft IS repairable, only to experienced repair techs, and is near impossible for your average repair novice to achieve.
Unfortunately, DJI has soldered the motor leads onto the logic board. If you don't know how to solder, this makes the repair that much more difficult. iFixit has not created any repair guides for the Mavic Pro, only a teardown. Please know that a teardown is NOT a repair guide, and that any instructions used in a teardown may make it near impossible to put back together.