Watch AlternateHistoryHubs the Dunkirk timeline. Gives a great series of events from Dunkirk utterly failing and Britain suing for peace, to the German conquest of the USSR.
After 1944 that he has Germany attack Britain again, America dropping nukes on Germany and then a heckin epic show down between the Anglo-Americans and Axis. So discredit anything past 44. Otherwise it’s an interesting scenario setting up a German-American cold war.
https://youtu.be/0_4J-hn9lAc?si=h_DB_lJWRO8KX2jT