I saw him comment on it, including interacting with one survivor. Both times Biden said some actual horrific shit, but was clearly just dementia brain.

But nobody cares because the moment he dropped out of the Election, everyone on both sides knew that we just weren't going to have a President for the rest of the year. We just can't admit to it because doing so would require the majority of his supporters to admit the Right was right and he has needed to resign for over a year now, so we all just keep pretending the seat isn't vacant.

People criticizing Kamala, including surprisingly a lot of her own side attacking her for giving Trump ammo, are just tacitly acknowledging that she is currently the sitting president and her current actions are showing her to be bad at it.