Sundowning. He's got a few hours a day when he can be "on;" after that his appearances have to be heavily managed.
what is just as important is how qualified and experienced of a team a president has around them. Biden has selected and chosen diversity and chosen well...guess it's just me, but if i HAD to choose, I would rather have the most senile person who has a great team around him or her than a evil WILLFULLY liar with no morality, ethics, integrity, or empathy and whose also a idiot (not naming names)..
From what I’ve seen his public appearances are almost always at around 2pm.