Earlier quoted context omitted.
It was 49.9% vs 48.3%. The 1.8% of people voting for a 3rd party candidate and those who didn't vote were implicitly endorsing Trump.
That’s a weird way to say 50.1% of votes were against Trump.
I used the word "endorsed", not "voted". The distinction does matter.
Only about 25% of the voting age public voted for Trump. Almost 25% of the voting age public weren't registered to vote, perhaps some of them wanted to vote but couldn't, so let's use the registered voters as the denominator. 75.8% of them voted; roughly one third for Trump, one third for Harris and one third didn't vote.
Choosing not to vote against a likely outcome is an endorsement of that outcome in my opinion.