Nobody did. I've not encountered a single person on the web who voted for Trump 2016. Not. a. one.
And that includes this site, of which I've been a member of it's 2016.
Oh, wait, it was one fella who claims he did, but only after I stated in the above, and he liked to play contrarian so much that even when we agreed on something, like music, he would return and delete his comments a later that day Shame, because he kept almost crossing the line and getting friendly with me on accounts of him having more in common with me than anybody else present on this site in the last couple of years as we were about the same generation, but each time he would stop himself and delete his comments and get all hostile again. Really sad, guy couldn't let himself enjoy himself because he had a script to keep to.
I do know someone IRL who did, and I suspect other members of his family did. That's it, no one voted for Trump in 2016. Nobody. Same with 2020.