OK, I confess I am mystified. An article in The Guardian by Musa al-Gharbi looks at the data now available on voting patterns in the US presidential elections of 2016 compared to 2020. Almost all groups moved towards being more pro-Trump, including both Black men and women, Hispanic men and women, Asian men and women, and white women. The only group that moved away from Trump was white men, with his margin declining from 31% to 23%. It is true that the minority groups overall supported Biden more than Trump, but they did so by smaller margins than they supported Clinton over him in 2016. Some sub=groups of minorities actually favored Trump, including Cuban Americans and Vietnamese Americans. The only sub-group moving away from Trump was Japanese Americans.
In terms of swing states, the move of Hispanics toward Trump gave him Florida and Texas, and the move of Blacks toward him gave him North Carolina. However, the flips of Michigan and Arizona were led by shifts of white men.
As I opened, I really do not know what is going on with all this, although the article noted that most of these trends have been going on for some time, if not especially noticed before.