Malay-Polynesia (also Insulinde or Malayo-Polynesia) isn't a country—it's a cultural-geographic macroregion spanning two oceans and 20+ nations, united by the Austronesian expansion that began ~5,000 years ago from Taiwan.
Indonesia, Malaysia, Philippines, Brunei, Singapore, Timor-Leste, Palau, FSM, Marshall Islands, Kiribati, Nauru, Guam, CNMI, Hawai'i (US), Papua New Guinea, Solomon Islands, Vanuatu, New Caledonia (FR), Fiji, Tonga, Samoa, Tuvalu, Cook Islands, Niue, French Polynesia, New Zealand.
This isn't academic taxonomy. Climate change threatens low atolls; cultural revival movements (voyaging canoes, language nests) reconnect dispersed kin. Malay-Polynesia is a living network, not a map label.