I have no contention other than it is well-known that some Pacific islands are disappearing.
Perhaps before you make up anything else, read this:
https://en.wikipedia.org/wiki/Sea_level_rise_in_New_Zealand#:~:text=NZ Searise study findings 2022,-The results of&text=of ground levels.-,In some parts of Wellington%2C the land is subsiding by,100 year event in 2020.
Subsidence and water rising go hand-in-hand.