Well, if you consider Native Americans to be "Mongoloid", which is an outdated term BTW, then yes, we literally lost our entire Hemisphere to White colonists & Black slaves, but there are parts of the Americas that are still mostly Amerindian, such as the northern Frontier of the Hemisphere (Northern Canada, Greenland, & the chunk of Alaska), Southern Mexico (especially Oaxaca) & the core of Guatemala, the Andes (such as Bolivia, Peru, & parts of Ecuador), & the Amazon, not all the Americas was replaced, parts of North America (the United States, Southern Canada, the core of Alaska, & Saint Pierre & Miquelon, as well as parts of Bermuda & Los Altos de Jalisco), as well as the Southern Cone (South Brazil, Uruguay, & Eastern Argentina) are examples of Amerindian lands that were replaced by White settlers & later immigrants, or the Caribbean (especially the Non-Hispanic Caribbean) or the lands around the Caribbean (such as the Guianas, & parts of coastal Colombia & Central America) or parts of Brazil & the Southern United States that were largely settled by Black slaves, & to a lesser extent South Asian Indentured Servants (especially in the Guianas & Trinidad & Tobago), again they were all 100% Amerindian lands for thousands of years.
As for East Asians, we'll China, Korea, Japan, Mongolia, Taiwan, & Southeast Asia are all still 100% or almost 100% Mongoloid, Siberia is a good example of Settler colonialism, where the Russians conquered, colonized, & replaced most of the Indigenous Siberians, which is why over 90% of Siberia is actually ethnic Russians (but some of the Ethnic Russians in Siberia also have Siberian ancestry), Central Asia was also entirely colonized by Russia, there are Russians all over Central Asia, but many left after the collapse of the Soviet Union, Northern Kazakhstan is still majority ethnically Russian, & Russian is one of the two official languages of Kazakhstan.
NW Europeans replaced Australoids in Australia (including Tasmania), as well as parts of New Caledonia, but most of Melanesia (including New Guinea) is still very Australoid, as they never experienced much settler colonialism.
Nearly all of Africa was colonized, parts of North Africa (such as Morocco, Tunisia, Algeria, & Libya), as well as Southern Africa (such as Zimbabwe, Angola, Namibia, Kenya, & South Africa) experienced settler colonialism by Europeans, but many left or were expelled after Independence (such as the French Pied-Noirs In Algeria, the Italians in Libya), while most of the White population left Zimbabwe due to Mugabes anti-white racism, & many White South Africans left South Africa after apartheid, the white population is now around 7% in South Africa (the highest in Sub-Saharan Africa), it was 21% before Apartheid, due to larger black birth rates & lower White birth rates.
In the Americas, the English-speaking Caribbean was mostly white, until mass importation of Blacks were brought as slaves, many Whites moved to the Thirteen Colonies, then many left after abolition & many more left after Independence (Jamaica is a good example), In Haiti, the Black slaves revolted against French rule, & got their independence, & genocided their remaining White population.
So, the answer is that Mongoloids were genocides in the Americas & Siberia, but not in East & Southeast Asia, same goes with the Australoids if we compare New Guinea & Australia, or Polynesians such in New Zealand & Hawaii (where it was largely affected by settler colonialism by White settlers), compared to Polynesians such as in Tonga & the Samoan Islands (where it's still very Polynesian).
So which race is being genocided? Many people say It's the Whites, due to mass non-white immigration, lower birth rates, homosexuality, & abortions, what about the Palestinians in Gaza, what about many South Asians living in the gulf Arab countries, think about it.
