In an old Twitter thread from around December 18, 2019, Indya Moore asked something about polar reversals. I responded to them, but they have since deleted their account and the original question along with it.
The magnetic poles are moving relative to the Earth's surface. They also reverse every 100,000 years or so. The magnetic equator would move along with them. When that will happen isn't very predictable and isn't human influenced. We could have higher cancer rates then (more)
The magnetic north pole has been moving from Northern Canada 100 years ago into the Arctic Ocean, heading towards Russia (more follows)
Polar Wandering - Encyclopedia Britanica
Its motion is probably related to the flow of iron in Earth's core. We're a giant electromagnet, like the Sun, which also flips its magnetic fields. The Sun does so regularly, once per 11 years. The Earth's is more complex and less predictable (more)
Is The Earth's Magnetic Field Reversing? - PBS Spacetime
Right now, the magnetic field steers away and shields us from some of the high energy cosmic rays (fast charged particles from space). Those can have some effect on damaging DNA (cancer, rates of evolution, etc.) But the atmosphere does most of the blocking. (more)
When there is a flip, we can expect there to be times of weak magnetic field and possibly more than one north pole and south pole for a bit. Since the auroras are caused by charged particles from the Sun riding our magnetic field, they would show up in different places (more)
While it's not related to the motion of the continents, magnetic reversals have help prove that our tectonic plates move - the lava from new crust freezes in the magnetic field direction at the time it cools leaving alternating stripes on the ocean floor Mid-Ocean Ridges: Magnetics & Polarity - Woods Hole Oceanographic Institute
But it shouldn't have a major effect on the weather. They have happened many times in the past before modern humans. They aren't associated with any extinction events.