In the first instance the Owners Corporation (O/C) is responsible for correcting whatever it is that caused the ground movement and for doing whatever is reasonably necessary to ensure that it doesn’t occur again.
The O/C is then responsible for repairing all damage to its building that has arisen as a consequence of the ground movement, and that includes to the internal surfaces of walls, the upper surfaces of floors including anything on or within those (like tiles and pipes), and to any areas that may be accidentally or unavoidably damaged as a consequence of the O/C making its repairs (like cracking the render on the inside whilst repairing an outside wall).
There are a few complications in circumstances where an Owner has, without the prior consent of the O/C, renovated their Unit and for example replaced the original wall tiles with something far more expensive, but I won’t get into that unless it’s relevant; let’s know if it is.