There has been an interesting "national" poll swing towards Biden, but the state polling has been rather consistent.
There has been a bit of movement in the national polls, but not as much as some would like to believe. Still showing Trump ahead when all polls are taken into consideration.
But the only thing that people seem to miss is that at this point four years ago Biden was leading by well over five points. This is still a remarkably big swing in favor of the former President over the current one. Much of that comes from the odd concept that Donald Trump is currently seen as more "likable" than Joe Biden, if you can believe that. Even when people questions whether or not Biden would make a good President, the idea was that at least he wouldn't be divisive like Trump. Turns out that he was neither a good President or much of a unifier. Thus the large swing in the polls.
Lastly, Trump still leads the battleground polling in RCP averages by nearly three points. That is where the bread is actually buttered.