To change the position or velocity inside the physics thread, you need to control it on the c++ side.
You can do it with functions like images.
The meaning of the function is as follows
・AddForce(): Add force.
・AddTorque(): Add torque
・V(): Acquire the velocity.
・SetV(): Sets the speed.
・X(): Get the position
・SetX(): Sets the position.
・R(): Gets the rotation.
・SetR(): Sets the rotation.