Most of the Oceanian islands in the map were formed after the Continental Drift, makes me wonder what was the past and future for similar islands
(Excluding New Zealand, Australia, New Caledonia, and Papua New Guinea), many Oceanian islands formed after the major phases of continental drift. These islands are mainly volcanic islands or coral atolls, including Hawaii, Kiribati, French Polynesia, the Cook Islands, Samoa, American Samoa, Tokelau, Niue, Nauru, the Marshall Islands, the Federated States of Micronesia, Wallis and Futuna, Tonga, Vanuatu, the Northern Mariana Islands, Palau, Fiji, and Pitcairn.
Past: Similar volcanic islands may also have existed in different parts of the world during the Pangaea era. What happened to them over geological time? Were they destroyed by tectonic activity and continental drift, submerged beneath the ocean, or transformed into other geological structures?
Future: What could happen to these modern Oceanian islands over the next hundred million years, assuming they are not submerged earlier by rising sea levels? Since they are not continental fragments, will they eventually erode away, sink beneath the ocean, and merge into tectonic boundaries?