How to move rigid body at constant speed using rigidbody.MovePosition()?

This is my first time posting a question here. Hopefully someone can help with the problem I am having. So I have an NPC that the player is supposed to race in the game. The NPC runs on a kinematic rigid body movement. It's path is already predetermined with no real AI adjusting to the player. Essentially, I want it to follow a path and complete it in a fixed amount of time. I would have used the MoveTowards() function, but for some reason the Cinemachine camera makes the sprite stutter when...

How to move rigid body at constant speed using rigidbody.MovePosition()?