Biden is down relatively big in Georgia, Nevada and Arizona, according to the polls, not so much in Michigan, Pennsylvania and Wisconsin, which he is down by like a point in each on the average(used be down by 3 like a month or so ago), Biden has some leeway on 2020, he can get by(barely) without the former three, as long as he wins the latter group of states.
Is it great news for Biden? No, but there is a likely path, though it is very narrow, as for whom the polls favor, since dobbs, the democrats overperforms polls most of the time now, so its actually the opposite way now, republicans are underperforming.