Everything basically goes about the same in WW2. Operation Overlord, Bagration, Husky, Torch, Manna, Dragoon all happen.
But around 1943 - 1944, many countries break away from their colonial empires. Kingdom of Egypt, Nigerian State, United Republic of Bengal, Republic of Dravida, Empire of Hind, Hashemite Confederation, Dominion of South Africa, Commonwealth of Australia, Dominion of Canada, you name it.
Türkiye, Spain, Iran, Ireland and Afghanistan opportunistically get lands, Türkiye invades the Greek Islands, Syria, and Lebanon. Iran invades Turkmenistan, Ireland annexes Northern Ireland, while Spain invades Morocco, Gabon and Congo as the colonizers just could not say no because the y didn't have enough resources to deal with these problems.
Allies and the Soviets just cannot advance past the Ardennes and Oder River respectively, while the Japanese prove to be more resilient than expected.
Berlin and Hokkaido are destroyed by nuclear weapons on January 31st 1946, by September 1946 a truce has been signed and on January 1st, 1947, WW2 officially ends with the signing of 10 peace treaties, some between colonial empires and independent movements, some between colonial empires and opportunistic countries, some reorganizing land, some between the Axis and the Allies, etc.
Germany has a destroyed capital and millions of wasted men and two huge threats. The Soviets had 35m casualties and barely gained anything and are having mass protests. The Japanese had their navy and Hokkaido destroyed, the Americans wasted millions of men in D-Day and in the Ardennes, and also used two nuclear weapons, while syndicalists and other radicals are rising. Britain has a collapsing empire, giving every American territory such as Falklands, Guyana, Carribean away to Canada, and losing Nigeria, Egypt, Middle East, and South Africa. The French saw lots of fighting on their territory from 1944 - 1945, as the Germans ravaged and burned the countryside whil retreating. Italy saw much fighting from 1943-1945, Benito died, Saló fell.
Hungary is still under the Arrow-Cross, Croatia under the Ustaze, while Poland and Slovakia are neutral buffer states between the USSR and the Reich, Slovakia being Reich-aligned and Poland being USSR-aligned, Greece is anarchist while Romania and South Slavia (Just Bulgaria and some remnants of Yugoslavia) are red. The Japanese control British Borneo, Malaya and French Indochina and parts of China as a part of the treaty, while in China, the Communists create a state in the west after a peace treaty. Germany gets Pre-WW1 borders in Poland, and also Netherlands, Luxembourg and Denmark, while retaining Czechia, Austria, Tyrol, Slovenia and a small bit of land in Croatia.
Here are the treaties signed and the countries that signed it;
Treaty of Fengtiang (Republic of China, British Empire, French Republic, Empire of Manchuria, Communist China, Empire of Japan, Mengjiang)
Treaty of Chongqing (Communist China, Republic of China, Uyghur Republic)
Treaty of Delhi (French Republic, British Empire, State of Kashmir, Hindustan, Kingdom of Afghanistan, United Republic of Bengal, Empire of Dravidia, State of Burma)
Treaty of Warsaw (Soviet Union, Polish Republic, Slovak State, German Reich, State of Hungary, Kingdom of Croatia, South Slavian Republic, Romanian Republic, Republic of Finland)
Treaty of Lille (French Republic, Luxembourgish Republic, The Netherlands, German Reich, United States of America, British Empire, Saló Republic, Italian Republic, Republic of Belgium, Kingdom of Norway, State of the Zaire)
Treaty of Navarre (Spanish Empire, French Republic)
Treaty of Amman (British Empire, Hashemite Federation, Kingdom of Egypt, National Turkish Empire, French Republic, Mutawakkilite Kingdom of Yemen, Sultanate of Muscat and Oman, Emirate of Transjordan, Iraqi Republic, Mandatory Palestine, Syrian Republic, Republic of Lebanon)
Treaty of Alberta (Dominion of Canada, British Empire, The Netherlands)
Treaty of Tokyo (Commonwealth of Australia, New Zealand, British Empire, Empire of Japan, United States of America, Indonesian Republic, 1st Philippines Republic, British Malaya, 2nd Philippines Republic, Empire of Vietnam, French Republic)
Treaty of Johannesburg (British Empire, Dominion of South Africa, Crown Colony of Nigeria, Nigerian State)