Earth’s inner core growing lopsided - but will not cause tilting

The video discusses the faster growth of iron crystals beneath Indonesia compared to Brazil due to cooling rates. It explains how Earth's shape is maintained by spinning and gravity, and how seismic waves reveal core disparities. The study suggests that heat loss in the core affects Earth's magnetic field, which has weakened over the past two centuries. The potential future solidification of the core could leave Earth without its magnetic protection.

What role does the flow of liquid iron in the outer core play in relation to Earth's magnetic field?

According to the study, what could be the effect of lopsided cooling in the core on Earth's magnetic field strength?