Yes, Biden dumped $2 billion in slickly produced ads into the swing states. “Let’s unify, bring back normalcy”, etc.). I’m sure those ads are already under development for 2024. And Biden will have unlimited resources to blanket the swing states with such ads. Those can be overcome, but not by Trump. Peoples’s minds are firmly made up about Trump. About 43% of the electorate are with him. But that’s all and it’s not enough to prevail.
That said, the big difference is this time it’s Biden who will have to defend his policies and his presidency. There’s plenty to attack him on there.
Trump was defensive in 2020, because of his COVID response, he would have cruised to re-election had it not been for COVID, before COVID, people pretty much accepted Trump for what he is, as long as times were good. COVID changed all that.