Magnets, monopoles, and dimensions

In the 3d reality, a magnet has its magnetic field, when looked at in a 2d sliced plane, it can be seen as a 2D-monopole, whose polarity can be simply switched by inverting the magnet in the frame of reference.
So what does that correspond a 3d magnetic field (or some field) existence, which needs to be switched to repel. A monopole all-attracting-all in 3d space is gravity, and one aspect that can be inverted for it to repel is time.

Inverting time, means to invert the forces acting and flowing (reversing the flow-same as inverting time), but not exactly inverting the laws that exist, because we think the information is destroyed (in ideal thinking sense at least). For example, when two objects of equal mass collide and become still at center, its plastic behavior only captures it, but how is that information then dissipated. For it to be exactly reversed, the information going in to the system must match all boundary conditions i.e. all emanating signals must come together back in time along with the emanated signals to make the flow as it was reversed.

For e.g. a video reversed in time can give what it would look like (which is impossible to see in reality).