Here's an idea of how voters have changed since 2016.
"Trump lost the support of many White men, a group he won decisively in 2016 and by less so in 2020. But the bigger story for Democrats and the reason they were unable to perform better against the President is that Biden narrowly underperformed Clintons margin of victory among voters of color, who all broke decisively for Biden, but by smaller margins than Clinton won them. Most alarming for Democrats is Trumps performance among Latinos. It helped him keep Florida, which has many Cuban-Americans and Puerto Ricans. But he trailed in Arizona, which has more Mexican-Americans."
"Bidens most convincing electoral argument was that he could recapture some of the White, working class voters who went to Trump in Rust Belt states in 2016. He certainly over-performed Clinton among White men and women without college degrees. He made inroads with White college educated men and underperformed Clinton, who was trying to become the first woman president, among White college educated women."
https://www.cnn.com/interactive/2020/11/politics/election-analysis-exit-polls-2016-2020/